人教版高二英语教案范文

人教版高二英语教案范文第1篇

Section A (1a~2d) 教学目标

【知识与技能】 掌握以下知识：

(1) 能掌握以下单词：allow, wrong, guess, deal, work out

能掌握以下句型：① What’s wrong? I’m really tried because I studied until midnight last night. ② You could give him a ticket to a ball game. ③ I think you should ask your parents for some money. ④ Why don’t you talk to him about it? 【情感、态度与价值观】 培养学生良好的合作意识，鼓励学生大胆表达自己的想法和意愿。正确认识生活中的一些困难，能采用正确的方式解决生活中的问题。

教学重难点

【教学重点】

1) Talk about the problems.

2) Learn the new language points.

【教学难点】

能根据对方所提出的问题，给出一些合理的建议。 学会表达建议的一些方式。

教学准备

图片、视频、多媒体等

教学过程

Step 1 Objectives To learn to talk about problems too much, too many, have to, don’t allow to do, get into a fight with To learn to give advice.

Why don’t you?

You should You could

Step 2 Warming up 1. 导入学生们平时在学校和生活中存在的问题。 T: What’s the matter/ What’s wrong? S: He has too much homework to do.

T: Do he like to do it? S1：No, he doesn’t. Because he doesn’t have any free time to do things he likes.

Step 3 Talking 1. Look at these problems. Do you think they are serious or not? Ss discuss with their partners and give some advice.

① I have to study too much so I don’t get enough sleep.

② I have too much homework so I don’t have any free time to do things I like.

③ My parents don’t allow me to hang out with my friends.

④ I have too many after-school classes.

⑤ I got into a fight with my best friend. Step 4 Listening

1. T: Tell Ss to read the sentences in 1a again. Make sure they know the meaning of the sentences. What problems are they talking about? 2. Play the recording for the Ss to listen and circle the problems you hear in 1a. 3. Play the recording again. Check the answers with the Ss. Step 5 Pair work

1. Let Ss read the conversation in the box.

2. Use the information in 1a to make other conversations. 3. Let some pairs act out their conversations.

e.g. A: What’s wrong?

B: I’m really tied because I studied until midnight last night. A: Why don’t you go to sleep earlier this evening?

4. Language points

1) allow v. 允许;准许

allow sb. (not) to do sth. (不)允许某人做某事

e.g. My parents don’t allow me to stay up late. 我父母不允许我熬夜。

Mr. Smith allowed Mike to drive there. 史密斯先生允许迈克开车去那里。 2) wrong adj. 错误的;不对的

= not right e.g. Some words on the advertisement are wrong. 广告上的一些字错了。 Step 6 Listening

Work on 2a:

T: Peter has some problems. What advice does his friend give him? Fill in the blanks with could or should.

1. Let Ss read the sentences in 2a.

2. Play the recording for the Ss to listen and write the words in the blank. 3. Play the recording again to check the answers.

Work on 2b:

1. Let Ss read the sentences below. Explain some main sentences for the Ss. Make sure they know the meaning of each sentence.

2. Play the recording for the Ss to write the letters (a-e) next to the advice in 2a.

3. Play the recording again to check the answers. Answers: 1. d 2. e 3. a 4. c 5. b

Exercise: Listen again. Fill in the blanks.

Boy 2 had a ______ with his best friend. He could ______ him a letter. But he isn’t good at writing letters. He ______ call him ____, but he doesn’t want to talk about it on the ______. He ______ talk to him so that he can say he’s sorry but it’s not ____. He ______go to his house but he doesn’t want to _______ him. He could take him to the _____________, but he doesn’t want to wait that long.

Step 7 Pair work

1. Tell Ss to make a conversation using the information in 2a and 2b.

2. Let one pair to read out their conversation first.

3. e.g. A: What’s the matter, Peter?

B: I had a fight with my best friend. What should I do?

A: Well, you should call him so that you can say you’re sorry.

B: But I don’t want to talk about it on the phone.

4. Ss act the conversation in pairs. Ask some pairs to act out their conversations.

Step 8 Role-play

1. Ss read the conversations and try to understand the meaning. 2. Read the conversation after the teacher. 3. Answer the questions. 1) How does Kim feel about her sister after her sister gave back the things? 2) Does Dave think it is all right for Kim’s sister to take away Kim’s things? How do you know? 3) Does Dave think the two sisters have a serious problem? How do you know? 4) What does Dave mean by saying “Hope things work out”?

4. Practice the conversation with their partner. Then let some pairs to act out the conversation. 5. Explain some new words and main points in the conversation. (1) I guess you could tell her to say sorry. guess v. 猜测;估计

e.g. Let us guess the height of the building.让我们来猜一下这个建筑物的高度。

(2) Although she’s wrong, it’s not a big deal.

big deal是英语中的一个固定搭配，表示 “重要的事情或状况”，多用于非正式交流。作否定用法时，常说It’s not a big deal或It’s no big deal.表示说话人并不认为某事有什么了不起。 e.g. There’s a soccer game on TV this evening but I don’t have to watch it. It’s no big deal. 今天晚上电视上有一场足球赛，但我不一定要看。没什么大不了的。

It’s a big deal, David, bigger than you know. 这事挺重要的，戴维，比你所知道的要重要。

What’s the big deal? It’s only a birthday, not the end of the world. 有什么了不起的?这不过是个生日，又不是世界某日。 (3) Hope things work out 希望事情会好起来。

这是一种常见的表达法，表示某些不如人意的事情会随时间的推移逐渐有所改观。 work out

解决(问题);算出

e.g. Mike worked out the difficult problem by himself. 迈克自己算出了那道难题。

Is it possible to work out the problem? 有可能解决这个问题吗? Step 9 Summary 本课小结

too much 太多

too many 太多

allow sb. to do sth. 允许某人做某事

hang out with sb. 和某人闲逛

after-school classes 课外补习班

get into a fight参与 / 卷入打架中 have a fight with ... 与打架

look through 快速查看;浏览

give sth. back 归还某物

find sb. doing sth. 发现某人在做某事 be angry with sb. 生某人的气

big deal 重要的事

write letters 写信

work out 成功地发展;解决 如何用英语表达建议

◆ Why not / Why don’t you do sth.? 你为什么不做某事呢? ◆ What / How about doing sth.? 做某事怎么样? ◆ Let’s do sth.让我们做某事吧

◆ You should do sth. 你应该做某事 ◆ You could do sth. 你可以做某事 Step 10 Exercises Ⅰ. 根据语境及所给首字母提示，补全所缺单词。 1. My parents don’t a______ me to go out at night. 2. What’s w______ with Jack? He has a sore throat. 3. Mom, my little sister broke my cup. It’s not a big d______. I will buy you a new one. 4. G______ what I did last Sunday. You went camping, right? Ⅱ. 根据语境，从方框中选择恰当的短语填空。

work out, get into a fight, too much, so that, look through, give back 1. Mom, you put ________________ salt in the soup. It isn’t delicious. 2. I hope all the things will ________________ well. 3. Let’s walk quickly ________________ we can get there on time. 4. Must I ________________ your bike next Monday, Bill? Yes. I will use it. 5. You shouldn’t ________________ with Bob. After all (毕竟), he is your best friend. 6. Peter turned on the computer and started to ________________ his e-mails. Ⅲ. 根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。 A: Hey, Mona! You look unhappy. (1)________ B: My brother Jim lost my book. A: Oh. Did he say sorry to you? B: Yes, he did. (2)________ A: Did you finish reading the book? B: No, I didn’t. (3)________ A: You could talk about it with your parents. Maybe they’ll buy you a new one. B: That’s a good idea. A: And don’t be angry with Jim again. (4)________ B: You’re right. (5)________ A: No problem. A. But I’m still angry with him. B. Thank you for your advice. C. Although he’s wrong, it’s not a big deal. D. You should go to the doctor. E. What happened? F. What did your brother do? G. What should I do?

Keys: Ⅰ. 1. allow 2. wrong 3. deal 4. Guess

Ⅱ. 1. too much 2. work out 3. so that

4. give back 5. get into a fight

6. look through Ⅲ. 1-5 EAGCB 课堂作业

Write three conversations about your problems and your friends’ suggestions. A: I have too many after-school classes. What could I do? B: You could

人教版高二英语教案范文第2篇

Section A (1a~2d) 教学目标

【知识与技能】 掌握以下知识：

(1) 能掌握以下单词：allow, wrong, guess, deal, work out

能掌握以下句型：① What’s wrong? I’m really tried because I studied until midnight last night. ② You could give him a ticket to a ball game. ③ I think you should ask your parents for some money. ④ Why don’t you talk to him about it? 【情感、态度与价值观】 培养学生良好的合作意识，鼓励学生大胆表达自己的想法和意愿。正确认识生活中的一些困难，能采用正确的方式解决生活中的问题。

教学重难点

【教学重点】

1) Talk about the problems.

2) Learn the new language points.

【教学难点】

能根据对方所提出的问题，给出一些合理的建议。 学会表达建议的一些方式。

教学准备

图片、视频、多媒体等

教学过程

Step 1 Objectives To learn to talk about problems too much, too many, have to, don’t allow to do, get into a fight with To learn to give advice.

Why don’t you?

You should You could

Step 2 Warming up 1. 导入学生们平时在学校和生活中存在的问题。 T: What’s the matter/ What’s wrong? S: He has too much homework to do.

T: Do he like to do it? S1：No, he doesn’t. Because he doesn’t have any free time to do things he likes.

Step 3 Talking 1. Look at these problems. Do you think they are serious or not? Ss discuss with their partners and give some advice.

① I have to study too much so I don’t get enough sleep.

② I have too much homework so I don’t have any free time to do things I like.

③ My parents don’t allow me to hang out with my friends.

④ I have too many after-school classes.

⑤ I got into a fight with my best friend. Step 4 Listening

1. T: Tell Ss to read the sentences in 1a again. Make sure they know the meaning of the sentences. What problems are they talking about? 2. Play the recording for the Ss to listen and circle the problems you hear in 1a. 3. Play the recording again. Check the answers with the Ss. Step 5 Pair work

1. Let Ss read the conversation in the box.

2. Use the information in 1a to make other conversations. 3. Let some pairs act out their conversations.

e.g. A: What’s wrong?

B: I’m really tied because I studied until midnight last night. A: Why don’t you go to sleep earlier this evening?

4. Language points

1) allow v. 允许;准许

allow sb. (not) to do sth. (不)允许某人做某事

e.g. My parents don’t allow me to stay up late. 我父母不允许我熬夜。

Mr. Smith allowed Mike to drive there. 史密斯先生允许迈克开车去那里。 2) wrong adj. 错误的;不对的

= not right e.g. Some words on the advertisement are wrong. 广告上的一些字错了。 Step 6 Listening

Work on 2a:

T: Peter has some problems. What advice does his friend give him? Fill in the blanks with could or should.

1. Let Ss read the sentences in 2a.

2. Play the recording for the Ss to listen and write the words in the blank. 3. Play the recording again to check the answers.

Work on 2b:

1. Let Ss read the sentences below. Explain some main sentences for the Ss. Make sure they know the meaning of each sentence.

2. Play the recording for the Ss to write the letters (a-e) next to the advice in 2a.

3. Play the recording again to check the answers. Answers: 1. d 2. e 3. a 4. c 5. b

Exercise: Listen again. Fill in the blanks.

Boy 2 had a ______ with his best friend. He could ______ him a letter. But he isn’t good at writing letters. He ______ call him ____, but he doesn’t want to talk about it on the ______. He ______ talk to him so that he can say he’s sorry but it’s not ____. He ______go to his house but he doesn’t want to _______ him. He could take him to the _____________, but he doesn’t want to wait that long.

Step 7 Pair work

1. Tell Ss to make a conversation using the information in 2a and 2b.

2. Let one pair to read out their conversation first.

3. e.g. A: What’s the matter, Peter?

B: I had a fight with my best friend. What should I do?

A: Well, you should call him so that you can say you’re sorry.

B: But I don’t want to talk about it on the phone.

4. Ss act the conversation in pairs. Ask some pairs to act out their conversations.

Step 8 Role-play

1. Ss read the conversations and try to understand the meaning. 2. Read the conversation after the teacher. 3. Answer the questions. 1) How does Kim feel about her sister after her sister gave back the things? 2) Does Dave think it is all right for Kim’s sister to take away Kim’s things? How do you know? 3) Does Dave think the two sisters have a serious problem? How do you know? 4) What does Dave mean by saying “Hope things work out”?

4. Practice the conversation with their partner. Then let some pairs to act out the conversation. 5. Explain some new words and main points in the conversation. (1) I guess you could tell her to say sorry. guess v. 猜测;估计

e.g. Let us guess the height of the building.让我们来猜一下这个建筑物的高度。

(2) Although she’s wrong, it’s not a big deal.

big deal是英语中的一个固定搭配，表示 “重要的事情或状况”，多用于非正式交流。作否定用法时，常说It’s not a big deal或It’s no big deal.表示说话人并不认为某事有什么了不起。 e.g. There’s a soccer game on TV this evening but I don’t have to watch it. It’s no big deal. 今天晚上电视上有一场足球赛，但我不一定要看。没什么大不了的。

It’s a big deal, David, bigger than you know. 这事挺重要的，戴维，比你所知道的要重要。

What’s the big deal? It’s only a birthday, not the end of the world. 有什么了不起的?这不过是个生日，又不是世界某日。 (3) Hope things work out 希望事情会好起来。

这是一种常见的表达法，表示某些不如人意的事情会随时间的推移逐渐有所改观。 work out

解决(问题);算出

e.g. Mike worked out the difficult problem by himself. 迈克自己算出了那道难题。

Is it possible to work out the problem? 有可能解决这个问题吗? Step 9 Summary 本课小结

too much 太多

too many 太多

allow sb. to do sth. 允许某人做某事

hang out with sb. 和某人闲逛

after-school classes 课外补习班

get into a fight参与 / 卷入打架中 have a fight with ... 与打架

look through 快速查看;浏览

give sth. back 归还某物

find sb. doing sth. 发现某人在做某事 be angry with sb. 生某人的气

big deal 重要的事

write letters 写信

work out 成功地发展;解决 如何用英语表达建议

◆ Why not / Why don’t you do sth.? 你为什么不做某事呢? ◆ What / How about doing sth.? 做某事怎么样? ◆ Let’s do sth.让我们做某事吧

◆ You should do sth. 你应该做某事 ◆ You could do sth. 你可以做某事 Step 10 Exercises Ⅰ. 根据语境及所给首字母提示，补全所缺单词。 1. My parents don’t a______ me to go out at night. 2. What’s w______ with Jack? He has a sore throat. 3. Mom, my little sister broke my cup. It’s not a big d______. I will buy you a new one. 4. G______ what I did last Sunday. You went camping, right? Ⅱ. 根据语境，从方框中选择恰当的短语填空。

work out, get into a fight, too much, so that, look through, give back 1. Mom, you put ________________ salt in the soup. It isn’t delicious. 2. I hope all the things will ________________ well. 3. Let’s walk quickly ________________ we can get there on time. 4. Must I ________________ your bike next Monday, Bill? Yes. I will use it. 5. You shouldn’t ________________ with Bob. After all (毕竟), he is your best friend. 6. Peter turned on the computer and started to ________________ his e-mails. Ⅲ. 根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。 A: Hey, Mona! You look unhappy. (1)________ B: My brother Jim lost my book. A: Oh. Did he say sorry to you? B: Yes, he did. (2)________ A: Did you finish reading the book? B: No, I didn’t. (3)________ A: You could talk about it with your parents. Maybe they’ll buy you a new one. B: That’s a good idea. A: And don’t be angry with Jim again. (4)________ B: You’re right. (5)________ A: No problem. A. But I’m still angry with him. B. Thank you for your advice. C. Although he’s wrong, it’s not a big deal. D. You should go to the doctor. E. What happened? F. What did your brother do? G. What should I do?

Keys: Ⅰ. 1. allow 2. wrong 3. deal 4. Guess

Ⅱ. 1. too much 2. work out 3. so that

4. give back 5. get into a fight

6. look through Ⅲ. 1-5 EAGCB 课堂作业

Write three conversations about your problems and your friends’ suggestions. A: I have too many after-school classes. What could I do? B: You could

人教版高二英语教案范文第3篇

Section A (1a~2d) 教学目标

【知识与技能】 掌握以下知识：

(1) 能掌握以下单词：allow, wrong, guess, deal, work out

能掌握以下句型：① What’s wrong? I’m really tried because I studied until midnight last night. ② You could give him a ticket to a ball game. ③ I think you should ask your parents for some money. ④ Why don’t you talk to him about it? 【情感、态度与价值观】 培养学生良好的合作意识，鼓励学生大胆表达自己的想法和意愿。正确认识生活中的一些困难，能采用正确的方式解决生活中的问题。

教学重难点

【教学重点】

1) Talk about the problems.

2) Learn the new language points.

【教学难点】

能根据对方所提出的问题，给出一些合理的建议。 学会表达建议的一些方式。

教学准备

图片、视频、多媒体等

教学过程

Step 1 Objectives To learn to talk about problems too much, too many, have to, don’t allow to do, get into a fight with To learn to give advice.

Why don’t you?

You should You could

Step 2 Warming up 1. 导入学生们平时在学校和生活中存在的问题。 T: What’s the matter/ What’s wrong? S: He has too much homework to do.

T: Do he like to do it? S1：No, he doesn’t. Because he doesn’t have any free time to do things he likes.

Step 3 Talking 1. Look at these problems. Do you think they are serious or not? Ss discuss with their partners and give some advice.

① I have to study too much so I don’t get enough sleep.

② I have too much homework so I don’t have any free time to do things I like.

③ My parents don’t allow me to hang out with my friends.

④ I have too many after-school classes.

⑤ I got into a fight with my best friend. Step 4 Listening

1. T: Tell Ss to read the sentences in 1a again. Make sure they know the meaning of the sentences. What problems are they talking about? 2. Play the recording for the Ss to listen and circle the problems you hear in 1a. 3. Play the recording again. Check the answers with the Ss. Step 5 Pair work

1. Let Ss read the conversation in the box.

2. Use the information in 1a to make other conversations. 3. Let some pairs act out their conversations.

e.g. A: What’s wrong?

B: I’m really tied because I studied until midnight last night. A: Why don’t you go to sleep earlier this evening?

4. Language points

1) allow v. 允许;准许

allow sb. (not) to do sth. (不)允许某人做某事

e.g. My parents don’t allow me to stay up late. 我父母不允许我熬夜。

Mr. Smith allowed Mike to drive there. 史密斯先生允许迈克开车去那里。 2) wrong adj. 错误的;不对的

= not right e.g. Some words on the advertisement are wrong. 广告上的一些字错了。 Step 6 Listening

Work on 2a:

T: Peter has some problems. What advice does his friend give him? Fill in the blanks with could or should.

1. Let Ss read the sentences in 2a.

2. Play the recording for the Ss to listen and write the words in the blank. 3. Play the recording again to check the answers.

Work on 2b:

1. Let Ss read the sentences below. Explain some main sentences for the Ss. Make sure they know the meaning of each sentence.

2. Play the recording for the Ss to write the letters (a-e) next to the advice in 2a.

3. Play the recording again to check the answers. Answers: 1. d 2. e 3. a 4. c 5. b

Exercise: Listen again. Fill in the blanks.

Boy 2 had a ______ with his best friend. He could ______ him a letter. But he isn’t good at writing letters. He ______ call him ____, but he doesn’t want to talk about it on the ______. He ______ talk to him so that he can say he’s sorry but it’s not ____. He ______go to his house but he doesn’t want to _______ him. He could take him to the _____________, but he doesn’t want to wait that long.

Step 7 Pair work

1. Tell Ss to make a conversation using the information in 2a and 2b.

2. Let one pair to read out their conversation first.

3. e.g. A: What’s the matter, Peter?

B: I had a fight with my best friend. What should I do?

A: Well, you should call him so that you can say you’re sorry.

B: But I don’t want to talk about it on the phone.

4. Ss act the conversation in pairs. Ask some pairs to act out their conversations.

Step 8 Role-play

1. Ss read the conversations and try to understand the meaning. 2. Read the conversation after the teacher. 3. Answer the questions. 1) How does Kim feel about her sister after her sister gave back the things? 2) Does Dave think it is all right for Kim’s sister to take away Kim’s things? How do you know? 3) Does Dave think the two sisters have a serious problem? How do you know? 4) What does Dave mean by saying “Hope things work out”?

4. Practice the conversation with their partner. Then let some pairs to act out the conversation. 5. Explain some new words and main points in the conversation. (1) I guess you could tell her to say sorry. guess v. 猜测;估计

e.g. Let us guess the height of the building.让我们来猜一下这个建筑物的高度。

(2) Although she’s wrong, it’s not a big deal.

big deal是英语中的一个固定搭配，表示 “重要的事情或状况”，多用于非正式交流。作否定用法时，常说It’s not a big deal或It’s no big deal.表示说话人并不认为某事有什么了不起。 e.g. There’s a soccer game on TV this evening but I don’t have to watch it. It’s no big deal. 今天晚上电视上有一场足球赛，但我不一定要看。没什么大不了的。

It’s a big deal, David, bigger than you know. 这事挺重要的，戴维，比你所知道的要重要。

What’s the big deal? It’s only a birthday, not the end of the world. 有什么了不起的?这不过是个生日，又不是世界某日。 (3) Hope things work out 希望事情会好起来。

这是一种常见的表达法，表示某些不如人意的事情会随时间的推移逐渐有所改观。 work out

解决(问题);算出

e.g. Mike worked out the difficult problem by himself. 迈克自己算出了那道难题。

Is it possible to work out the problem? 有可能解决这个问题吗? Step 9 Summary 本课小结

too much 太多

too many 太多

allow sb. to do sth. 允许某人做某事

hang out with sb. 和某人闲逛

after-school classes 课外补习班

get into a fight参与 / 卷入打架中 have a fight with ... 与打架

look through 快速查看;浏览

give sth. back 归还某物

find sb. doing sth. 发现某人在做某事 be angry with sb. 生某人的气

big deal 重要的事

write letters 写信

work out 成功地发展;解决 如何用英语表达建议

◆ Why not / Why don’t you do sth.? 你为什么不做某事呢? ◆ What / How about doing sth.? 做某事怎么样? ◆ Let’s do sth.让我们做某事吧

◆ You should do sth. 你应该做某事 ◆ You could do sth. 你可以做某事 Step 10 Exercises Ⅰ. 根据语境及所给首字母提示，补全所缺单词。 1. My parents don’t a______ me to go out at night. 2. What’s w______ with Jack? He has a sore throat. 3. Mom, my little sister broke my cup. It’s not a big d______. I will buy you a new one. 4. G______ what I did last Sunday. You went camping, right? Ⅱ. 根据语境，从方框中选择恰当的短语填空。

work out, get into a fight, too much, so that, look through, give back 1. Mom, you put ________________ salt in the soup. It isn’t delicious. 2. I hope all the things will ________________ well. 3. Let’s walk quickly ________________ we can get there on time. 4. Must I ________________ your bike next Monday, Bill? Yes. I will use it. 5. You shouldn’t ________________ with Bob. After all (毕竟), he is your best friend. 6. Peter turned on the computer and started to ________________ his e-mails. Ⅲ. 根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。 A: Hey, Mona! You look unhappy. (1)________ B: My brother Jim lost my book. A: Oh. Did he say sorry to you? B: Yes, he did. (2)________ A: Did you finish reading the book? B: No, I didn’t. (3)________ A: You could talk about it with your parents. Maybe they’ll buy you a new one. B: That’s a good idea. A: And don’t be angry with Jim again. (4)________ B: You’re right. (5)________ A: No problem. A. But I’m still angry with him. B. Thank you for your advice. C. Although he’s wrong, it’s not a big deal. D. You should go to the doctor. E. What happened? F. What did your brother do? G. What should I do?

Keys: Ⅰ. 1. allow 2. wrong 3. deal 4. Guess

Ⅱ. 1. too much 2. work out 3. so that

4. give back 5. get into a fight

6. look through Ⅲ. 1-5 EAGCB 课堂作业

Write three conversations about your problems and your friends’ suggestions. A: I have too many after-school classes. What could I do? B: You could

人教版高二英语教案范文第4篇

必修本

第37课时 性别决定与伴性遗传

金湖中学 沈德邻

知识精华

染色体组型：概念、染色体分类 性别决定：概念、类型、过程 伴性遗传：

概念：性染色体上的基因控制的性状遗传与性别相联系的遗传方式类型：患者基因型：XbXbI(患病的女性)，XbY(患病的男性)隐性致病基因及其等位基因只位于X染色体上男 性患者多于女性患者伴X隐性遗传遗传特点象往往有隔代交叉遗传现女患者的父亲和儿子一定患病血管瘤、果蝇的白眼、女娄菜的狭披针形叶实例：色盲、血友病、患者基因型：XAXA、XAXa(患病的女性)，XAY(患病的男性)显性的致病基因及其等位基因只位于X染色体上女性患者多于男性患者伴X显性遗传遗传特点具有世代连续性男患者的母亲和女儿一定患病 颤实例：抗VD佝偻病、钟摆型眼球震患者基因型：XYM(Y染色体上的基因无等位基因，所以也无显隐性之分)伴Y遗传遗传特点：患者全为男性且“父子孙”实例：外耳道多毛症题例领悟

例题：一位遗传学家在研究甲、乙、丙三只果蝇的两对相性状的遗传现象时，发现三只果蝇的基因型分别是：EFf(甲)、EeFf(乙)、eFf(丙)。(1)这两对基因分别在哪类染色体上?_______。(2)三只果蝇中，属于雄性的是________。(3)甲果蝇形成的配子及比例可表示为______，乙果蝇形成的配子及比例可表示为_______。

解析：性染色体上的基因在雌性个体(XX)上成对存在，在雄性个体(XY)上成单存在。从题意可知，甲中的E基因成单存在，说明E、e基因均位于X染色体上，且可推甲、丙只含有一条X染色体，故两者均为雄性果蝇，乙含有两条X染色体，为雌性果蝇。F、f基因在两性果蝇中均成对存在，说明它们位于常染色体上。

1 生物必修

高中生物必修二

答案：(1)E与e基因存在于X染色体上，F和f基因位于常染色体上

(2)甲、丙 (3)1FX：1fX：1FY：1fY 1FX：1FX：1fX：1fX

自我评价

一、选择题

1、人体与性别决定有关的X、Y性染色体同时存在于 ( ) A、卵细胞 B、精子 C、极体 D、体细胞

2、一对表现正常的夫妇，生下一个既是白化病又是色盲的男孩，那么这对夫妇的基因型分别是 ( ) A、AaXY和AaXX B、AAXY和AaXX C、AAXY和AAXX D、AAXY和AAXX

3、将基因型AaXX的个体与基因型为AaXY的个体杂交，其子代的基因型有 ( ) A、4种 B、8种 C、9种 D、12种

4、某种牛基因型AA的个体是红褐色，aa的个体是红色，基因型Aa的公牛是红褐Bb

BBBb

B

BBBBb

B

B

E

E

E

e

e

e色，母牛则是红色。现有一头红褐色母牛生了2头红色小牛，这2头小牛的性别是 ( ) A、全为公牛 B、全为母牛

C、一公一母 D、无法确定

5、人类白化病和血友病都是隐性遗传病，一个患白化病的女性(其父患血友病)与一个不患血友病的男性(其母是白化病)婚配，预期在他们的儿女中两病兼发患者的几率是 ( ) A、1/2 B、1/3 C、1/4 D、1/8

6、雄蛙和雌蛙的性染色体组成分别为XY和XX，假定一只正常的XX蝌蚪在外界环境的影响下，变成了一只能生育的雄蛙，用此雄蛙和正常雌蛙交配(抱对)，其子代中的雌蛙和雄蛙的比例是 ( ) A、1：1 B、2：1 C、3：1 D、1：0

二、简答题

7、某种雌雄异株的植物有宽叶和狭叶两种类型，宽叶由显性基因B控制，狭叶由隐性基因b控制，B和b均位于X染色体上。基因b使雄配子致死。请回答：

(1) 若后代全为宽叶雄株个体，则其亲本基因型为______________。

2 生物必修

高中生物必修二

(2) 若后代全为宽叶，雌、雄株各半时，则其亲本基因型为_____________。 (3) 若后代全为雄株，宽叶和狭叶个体各半时，则其亲本基因型为________。 (4) 若后代性比为1：1，宽叶个体占3/4，则其亲本基因型为___________。

自我评价答案：

1、D

2、A

3、D

47、(1)XBXB、XbY (2)X

、B

5、D

6、D

BXB、XBY (3)XBXb、XbY (4)X生物必修

人教版高二英语教案范文第5篇

知识：

会认6个生字，会写14个生字。能正确读写“集合、招架、紧张、固然、乌龟、自卫、进攻、炮口、坦克、合二为

一、战场、大显神威、首次、乱成一团、长处、胜利者”等词语。

能力：

1.正确流利地朗读课文。

2.继续学习默读课文。读懂课文内容。 3.初步了解用事实来说明道理的表达方式。 情感：

结合生活经验理解“谁善于把别人的长处集于一身，谁就会是胜利者。”的道理。

教学重点、难点：

引导学生了解发明家是怎样发明坦克的，即把盾的自卫和矛的进攻的优点合二为一的过程是教学的重点;理解、体会坦克的发明引发的道理是教学的难点。 设计理念

在通读课文、整体感知的基础上，突出研读重点，引导学生围绕重点句进行尝试阅读，充分发挥研读对全篇课文的穿透力。在教学中将语言训练和思维训练有机地融合起来，让学生在理解课文的基础上，提升语言表达能力;同时从“谁善于把别人的长处集于一身，谁就会是胜利者”的道理中得到启发，培养学生良好的思维品质，从而实现多维教育目标的有效整合。 教学准备：教师准备多媒体课件、学生课前预习 教学过程

一、单元导入，揭示课题质疑

1.阅读第七组单元导语，了解单元学习主题。

【设计意图：明确单元目标，核心突出，兼具整体感。】

2.同学们，世界上有许多有趣的发明都是人们从大自然中、生活中受到启发而创造的，今天我们来学习《矛和盾的集合》。(板书课题，学生齐读课题) 学写生字“矛、盾、集”。学生观察、发现写字时要注意的地方。(矛：不要少一撇;盾：外侧有两笔，平撇加竖撇;集：共有五横，长短有变化字形才好看。)

3.看到课题，你能提出什么问题?预设： 什么是矛?什么是盾?(谁知道?指生说。结合看图理解：矛是一种用于进攻的兵器。盾是一种用于防守自卫的武器。)

存疑1：矛和盾为什么要集合在一起?(怎么想到把矛和盾集合在一起的?) 存疑2：矛和盾是怎样集合在一起的? 存疑3：矛和盾集合的结果(作用)怎样?

【设计意图：从课题处质疑，一是激发学生阅读期待，引领学生更好地理解课文内容;二是孩子的就课题质疑的能力提高，就能快速了解题目涉及到哪些方面的内容，遇到围绕一个主题来写话或写日记的情况，就知道从哪几个方面来写。】

过渡：会提问题的人，是最会读书的人，同学们带着这些问题来读读课文吧。

二、读准读通，感知主要内容

1.自由读课文，读准字音，读通句子，想想课文主要讲了什么? 2.检查生字词掌握情况。出示词语，开火车读。男生、女生比赛读。 3.交流课文主要讲了什么?指名学生说一说。如果学生有困难，课件出示填空练习，降低概括难度。

课文主要讲了发明家将(

)的(

)和(

)的(

)合二为一，发明了(

)。 坦克在战场上(

)。说明了(

)的道理。

【设计意图：课文浅显易懂，因此，放手让学生读，通过多种形式的读，学生既强化了对课文内容的感知，又培养了自学能力。】

三、潜心会文，感悟发明心路 (解决疑问

1、2)

1.默读思考：矛和盾为什么要集合在一起?(发明家怎么想到把矛和盾集合在一起的?)

① 师：谁来读读自己划的句子?(对方的矛如雨点般向他刺来，发明家用盾左抵右挡，还是难以招架。)

②同学们，有些句子读着读着可以读出一幅画面来。请同学们自由地反复读读这句话，读着读着你仿佛看到了什么?(学生回答)师：是呀，多么快的矛啊! 对方的矛刺向发明家的上方，发明家马上用盾 (学生：抵挡)，刺向他的下方，他马上用盾 (学生：抵挡)，刺向左方 (学生：马上用盾抵挡)，刺向右方 (学生：马上用盾抵挡)，这就是 (学生：左抵右挡)。尽管发明家左抵右挡，还是 (学生：难以招架)。

③让我们来演演那紧张危急的时刻吧! 请拿出你的手当作盾，老师的矛要进攻了，准备好了吗?我的矛刺向你的上方、下方、左方、右方(学生做动作，说体会) 师：尽管我们左抵右挡，但抵挡得住吗?这真是 (学生：难以招架)，抵挡不住，抵挡不及，这就是(学生：难以招架)!

④师：对方的矛如雨点般向他刺来，越刺越快，越刺越快，多令人紧张啊!读

师：对方的矛如雨点般向他刺来，越刺越有力，越刺越有力，多么危急啊!读

【设计意图：通过抓重点词，体会发明家正处于紧张危急的情境之中。用联系上下文、动作表演等方式理解词语，然后指导有感情地朗读，用朗读展现出矛强大的攻击力，感受到“盾太小啦!”】

2. 在这紧张危急的关头，发明家在想些什么，矛和盾是怎样集合在一起的?

请同学们再默读2-4自然段，并画出相关句子。 阅读提示：

发明家手持矛和盾与朋友比赛，在紧张危急的关头，他想

。

可是

，对了，发明家灵机一动，

。

当然，这铁屋子还要会跑，

。 于是，发明家发明了坦克。 3.交流。根据回答相机出示句子：

盾太小啦!如果盾大得像个铁屋子，我站在铁屋子里，敌人就一枪也戳不到我啦!

可是，这样固然安全，自己却变成了只能缩在壳里保命的蜗牛或乌龟。自卫，是为了更好地进攻呀!

对了，在铁屋子上开个小洞，从洞里伸出进攻的 “矛”枪口或炮口。当然，这铁屋子还要会跑，得装上轮子，安上履带。

①让我们先来研究研究发明家的第一个想法。请同学们先自由读读这个想法，边读边想想：你认为发明家的这个想法好不好，为什么? (根据学生回答板书：盾 自卫)

②这样就完美了吗?有没有不足的地方?(学生交流第二个想法) 是呀，自卫，是为了 (学生：更好地进攻呀)

③这可怎么办呢?发明家又想到了什么?(学生交流第三个想法)(根据学生回答板书：矛 进攻) 发明家把盾的自卫、矛的进攻合二为一，发明了坦克。 【设计意图：“教学不仅仅是一种告诉，更多的是学生的一种体验，探究和感悟。”在课堂教学中，要多给学生展示的舞台，多给学生说话的机会。用他们的体验和感悟来代替教师乏味的说教。】 4. 课件出示坦克图：让我们来看看坦克图，哪里是坦克的“矛”，它的作用是?(学生：进攻)哪里是坦克的 “盾”，它的作用是?(学生：自卫) 发明家经过思考，又加上轮子，安上履带，使坦克可以自由地进攻、自卫。 【设计意图：了解发明过程，领悟思维方法是本课的重点。在阅读中，读懂发明家遇到了什么问题，怎么想，在层层深入思考中发明坦克的过程。并且在这个过程中结合语言学习，提高品悟积累的能力。在教学中运用换词、动作表演，图片联系上下文等方式理解词语，促进对文本的理解。】

四、品词析句，领略集合之威(解决疑问3)

1.坦克把盾的自卫和矛的进攻合二为一(板书：合二为一)，这里的“合二为一”就是课题中的 (生：集合)。集合优点的结果怎样?请同学们快速浏览课文，找一找并画出来! (根据回答出示句子：坦克把盾的自卫、矛的进攻合二为一，在战场上大显神威。)

2.你从哪儿感受到了坦克的“大显神威”呢?请自由读读课文第五自然段。(根据回答，出示句子：德国兵头一回见到这庞然大物，吓得哇哇直叫，乱成一团，一下子退了十公里)

①你从哪儿感受到了坦克的“大显神威”? “庞然大物”这个词让你感受到了什么?你能读出这个词的庞大气势吗? “哇哇直叫”中的“直”是什么意思?他们在不停地叫什么呢? “乱成一团，一下子退了十公里”又让你们感受到了什么? 你能读出德国兵害怕，惊慌失措的样子吗?指导朗读。

②小结学法：通过抓关键词语“庞然大物、哇哇直叫、乱成一团”等来感受到坦克在战场上大显神威。

③补充资料：1916年9月15日早晨，在法国的索马河畔(pàn)，大雾弥漫，英国军队将一种钢铁“怪物”投入战场，只见它大摇大摆向德军铁丝网和战壕(háo)密布的阵地冲去，德军慌忙集中大量的机枪向它射击，可是枪弹都从钢铁装甲上纷纷滑落，德国兵吓得屁滚尿流，纷纷逃窜(cuàn ) ，英军乘势占领了德军的阵地。这种大显神威的武器，就是首次在战场上使用的坦克。 3. 让我们再次体会这句话吧!学生齐读：坦克把盾的自卫、矛的进攻合二为一，在战场上大显神威。(补充板书：矛+盾坦克)

发明家把盾的自卫、矛的进攻合二为一，发明了坦克，这样的集合使坦克在战场上 (学生：大显神威) (补板书：进攻+自卫大显神威) 【设计意图：有人说过:“一堂好的语文课是读出来的。”可见阅读的重要性。语文课要多读，“以读为主，合理想象，适当扩展”。在指导第5自然段朗读时，让学生说说从哪些词语中可以看出坦克的威力。同时让学生想象，“哇哇直叫” “乱成一团”会是怎样的景象?抓重点词语的理解体会感悟，感受坦克集别人的优点于一身的威力，与文本进一步交流。这样学生自然而然会把有关词语读重音，并且在朗读时感受到了发明家发明出的坦克的威力,惊叹创新的神奇威力。】

五、结合实际，品味集合之道 1. 坦克在战场上大显神威是因为它集合了矛和盾的长处。课文用这样一个故事来说明了一个道理

是的，谁善于把别人的长处集于一身，谁就会是胜利者。(学生齐读：“是的，谁善于把别人的长处集于一身，谁就会是胜利者。”)你能说说对这句话的理解吗?(交流后再次齐读)

2.在我们的实际生活中，有许多东西都是把别人的长处集于一身而形成的。你能举例子来说说吗?(如带橡皮头的铅笔、轮椅、轮滑鞋、空调、带墨囊的钢笔等等。)物品的集合使我们的生活更方便、更精彩。

人教版高二英语教案范文第6篇

(第1课时)

一、教学目标

(1)知识目标：1、认识氧气的主要物理性质;

2、观察和描述木炭、铁丝、硫粉等在氧气中燃烧的现象，从中归纳出氧气的化学性质。

(2)过程与方法：通过实验培养学生观察能力、描述实验现象的能力以及分析实验现象的能力。

(3)情感价值:

通过探究活动，提高学生学习兴趣，激发求知欲，培养学生科学素养。

二、教学重难点

重点：1：氧气的化学性质。

2：硫、铁、与氧气反应的现象

难点：1.氧气的化学性质。

2.化合反应和氧化反应概念。

三、教学仪器与药品

装满氧气的集气瓶、燃烧匙、酒精灯、玻璃片、硫磺、木炭、铁丝、火柴。

四、教学过程与内容

新课引入：氧气是一种非常重要的气体，它可以共给我们呼吸，我们离开氧气的时间不能太长，否则就会因为缺氧而死亡。(学生做憋气活动1分钟)对我们如此重要的气体，同学们到底对氧气了解多少呢?

一、氧气的物理性质

(培养学生的阅读能力)要求学生认真阅读课本33页的第一段，总结氧气的物理性质

(PPT展示)

(1)

色、态、味：无色、无味、气态

(2)

溶解性：不易溶于水

(3)

密度：比空气略大

(4)

三态变化：气态(无色)液态(淡蓝)固态(淡蓝雪花)

二、氧气的检验（PPT展示）

用带火星的木条伸到集气瓶中，如果木条复燃，则证明是氧气。(教师演示)

三、氧气能跟很多的物质发生反应。

【演示1】硫的燃烧

引导学生观察硫磺在空气和氧气中燃烧时现象的不同

【学生总结】实验现象：①硫在空气中能燃烧,发出微弱淡蓝色火焰;

②在氧气中燃烧,发出蓝紫色火焰.

③生成一种有刺激性气味的气体.

硫

+

氧气

二氧化硫

【演示2】木炭的燃烧

【学生总结】实验现象：在氧气中燃烧比空气中更旺，发白光。

注：木炭应由上向下缓慢伸进盛有氧气的集气瓶中，为保证有充足的氧气支持木炭燃烧。

碳

+

氧气

二氧化碳

【演示3】铁丝在氧气中燃烧

【学生总结】实验现象：剧烈燃烧，火星四射，生成黑色固体。

铁+

氧气

四氧化三铁

【学生讨论】：为什么铁，硫，木炭在空气中燃烧的现象和在氧气中燃烧的现象不一样?为什么硫和铁在集气瓶中燃烧的时候都要在集气瓶底部放少量的水，分别有什么作用?

【学生与老师总结】

实验1中：吸收SO2防止空气污染;(还可以放碱性物质效果更好)

实验2中：防止燃烧的木炭火星掉落损坏集气瓶;

实验3中：防止铁燃烧时的高温熔化物掉落损坏集气瓶底。(也可以铺一层沙子)

三、化合反应和氧化反应：（PPT展示）

【提问】从反应前后各有多少种物质来分析，碳、硫、铁等物质与氧气的反应有什么共同的特点?

【讨论】引导学生讨论，得出以上反应都是有两种物质参加反应生成一种物质的结论。

化合反应：两种或两种以上物质生成一种新物质的反应叫化合反应。

氧化反应：物质和氧发生的反应叫氧化反应。【讲解】讲解氧化反应的定义以及氧化反应的类型。(举例说明)以及生活中的一些由缓慢氧化引起的现象(从而引如《食品安全法》)。

中华人民共和国《食品安全法》第八十五条规定：

经营腐败变质、油脂酸败、霉变生虫、污秽不洁等食品的或任意添加对人体有伤害的防腐剂。由有关主管部门，没收用于违法生产经营的工具、设备、原料等物品;情节严重的，吊销许可证。

【讨论】引导学生讨论。氧化反应是不是化合发应，化合反应是不是氧化反应?

五、板书

1、氧气的物理性质：

(1)一般情况下，无色无味的气体。

(2)密度比空气大。

(3)不易溶于水

(4)氧气三态：气态(无色)液态(淡蓝色)固态(淡蓝色)

2、化学性质：

(1)助燃性

(2)氧化性

碳

+

氧气

二氧化碳

硫

+

氧气

二氧化硫

铁+

氧气

四氧化三铁

3、化合反应与氧化反应

化合反应：两种或两种以上物质生成一种新物质的反应叫化合反应。

特点：多合一

氧化反应：物质和氧发生的反应叫氧化反应。

六、作业布置

课堂练习：课本36页