Step 1 Review 第一步 复习 (通过复习有关过去和现在的生活情况.训练学生归纳总结能力和口语表达能力.并引出新话题.) T: From Topic 1, we have known a lot about the lives of the past. Let’s retell it. First, you can talk about it in groups, and then I will ask some of you to show yourselves. T: Please stop here. Next, let’s share your opinions. S1: Most people had a hard life. S2: They had no chance to go to school. S3: Some of them had to work and make money to help support their families. S4: Many kids used to be child laborers. S5: The roads used to be narrow and the houses used to be too small and dark. (教师总结.引出本节课中心话题.) T: You've done very well. But do you know why the life used to be like that? S6: Because at that time, there were too many children in almost each family. S7: China’s economy grew slowly. T: Yes. You’re right. Also China has the largest population in the world. population T: Who can tell us what the life is like now? S8: The living conditions are comfortable. S9: The roads are wider and the buildings are taller and brighter. S10: Everyone has a chance to go to school. T: Well. Our lives have changed better and better. We are so happy. China has developed a lot. Chin’s population grows more slowly than before because of China’s one-child policy. One-child policy (让学生围绕“one-child policy 展开讨论.) T: Let's talk about “one-child policy and “the only child in China . S11: One-child policy means there is only one child in a family. S12: One-child policy makes the population of China grow more slowly. S13: I’m the only child. I feel lonely. S14: In many families, the members of the families treat the only child as “Little Emperor . T: Yes. Our living conditions get better and better. But we mustn't be “Little Emperors . It’s too bad. Let's go on talking about “one-child policy . S15: We can study in a modern school. S16: We have a chance to go to school now. T: Yes. It’s possible for everyone to go to school. possible S17: All of you are right. But I think there are still too many people in China. I really hate to go shopping- T18: I think so. I hate to go shopping because there are usually too many people. T: Don’t say the unhappy things. Just now, everyone did a good job. Now let’s read the words on the blackboard and make your own sentences with them. First. you can do it in groups, then please choose some of the best sentences and write them down on the blackboard. (两分钟后.小组可能选出很多好句子.教师选出最好的写在黑板上.) population: China has the largest population. increase: The cows on the farm increase rapidly. policy: We should know about the policy of our country. possible: It’s possible for us to learn English well if we study hard. (让学生练习这些句子.使其基本掌握新词.为听1对话排除障碍.) Step 2 Presentation 第二步 呈现 (教师播放录音.并给学生布置听力任务.) T: China is a country with the largest population. It brings lots of troubles. Now let’s listen to 1 and know about what has happened to Kangkang and Michael. (教师用小黑板或幻灯片呈现下面命题.让学生判断正误.) T:Let’s listen carefully and mark for False. 1. Kangkang likes to go shopping. 2. They got lost and couldn’t find each other just now. 3. There were too many people in the shop. Ss: 1F 2.T 3.T (如果学生不能正确回答上面的问题.可听第二遍.) T: Kangkang and Maria come to Kangkang’s home. Now they’re talking about Kangkang’s family photos. Please listen to 3a and mark for False. (教师在黑板或幻灯片上呈现3b.) (学生听完后.核对答案.如果一遍听不懂.可以再听一遍.) Step 3 Consolidation 第三步 巩固 (核对答案后.让学生自读对话.为表演对话做准备.) T: Excellent. Next, please prepare 3a for two minutes with your partners. Then try to perform it well. (教师在黑板上写出3a的关键词.并在黑板上张贴康康家的近照和60年代家庭人多条件差的全家福.) a nice photo, love their living conditions at least the largest population great changes one-child policy Little Emperors be strict with (请几组同学到前面看着黑板上的关键词及照片进行表演.看哪一组同学的表现好.) T: Please stop. Which group can come to the front and perform the dialog. Let’s welcome the volunteers. (本段对话较难.鼓励学生不要怕犯错误.可让一些优生先做示范.) G1: - G2: - G3: - T: I think you had a wonderful performance. GA is the best. GC has made rapid progress- Step 4 Practice 第四步 练习 1.T: We've just talked about Kangkang’s family photos. Next, let’s practice the present perfect. Please do 2 by yourselves. You can do it in groups. T: Let’s check your answers. just already yet ever never T: Now please make sentences with these words. S1: I have just made a sentence. S2: He has already done his homework. S3: Have you heard from him yet? S4: Have you ever driven a car? S5: I have never been abroad. (小组讨论人口多带来的问题.并与同伴准备进行对话表演.) 查看更多

 

题目列表(包括答案和解析)

如图甲表示某生物膜结构,图中A、B、C、D、E、F表示某些物质,a、b、c、d表示物质跨膜运输方式。图乙和图丙表示物质运输曲线,请据图回答:


(1)若图甲是癌细胞的细胞膜,则膜上含量较正常细胞减少的物质是[  ]    
(2)若图甲是线粒体膜,b和c过程运输的气体分别是    。b、c运输方式符合图    所表示的物质运输曲线。
(3)若图甲表示人体红细胞膜,则表示Na、K运输的分别是图中      。Na、K的运输方式符合图    所示曲线。
(4)已知红细胞吸收葡萄糖是协助扩散,而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖,请设计实验加以确定。
①实验步骤:
第一步:取甲、乙两组生理状况相同的小肠上皮细胞,放入适宜浓度的含有葡萄糖的培养液中。
第二步:甲组细胞给予正常的呼吸条件,         
第三步:                
②预测实验结果并分析:
a.若甲、乙两组细胞对葡萄糖的吸收速率基本相同,则         
b.                                

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(10分)植物具有向重力生长的特性,下列是研究根向重力生长机理的两个实验。
实验一:将空白琼脂和含EDTA的琼脂做成帽状,分别套在甲、乙两组玉米胚根的根冠外(示意图如下)。提示:EDTA的作用是去除与其临接部位的 Ca2+

将胚根水平放置培养一定时间后,观察到甲组胚根向重力(下)生长,乙组胚根水平生长。根据上述实验结果,得出实验结论:                               
  实验二:水平放置的胚根弯曲向下生长,与根冠近地侧的Ca2+浓度明显高于远地侧有关。研究表明,根总是朝着Ca 2+浓度高的方向弯曲生长。为验证这一结论,有人设计了下列实验方案。请根据提供的实验材料和用具,写出第二步及以后的实验步骤和实验结果,并回答问题。
(1)实验材料和用具:胚根等长的萌发玉米种子,空白琼脂帽,含EDTA的琼脂帽,上面部分含Ca2+的琼脂帽(水平方向),培养皿等。
(2)实验步骤:
  第一步:取若干个培养皿,在每个培养皿中放置适量的萌发玉米种子,按实验一中乙组的方法处理胚根一定时间后,移去根冠外的琼脂帽。然后将培养皿平均分成两组,编号为 A组、B 组。 
  第二步:                                                            
  第三步:                                                            
(3)实验结果:                                                         
(4)科学家进一步证实,根冠中生长素的分布受Ca2+浓度影响,当胚根水平放置时,重力诱导Ca2+向根冠下侧移动,导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系:                                  

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阅读短文,在其后空白处写出各单词的正确形式。单词的第一个字母已经给出。
The worst traveler in the world was Paul of San Francisco. Once he f____【小题1】 from the U.S. to his hometown in Italy to see someone at home. The plane made a one-hour stop to get oil at an airport in New York. Paul thought he was in Rome. C____【小题2】, he got off the plane.
When nobody was there to meet him, Paul thought maybe the heavy t____【小题3】 made his friends late. While looking for their address, Paul found that the old “Rome”had changed a lot. He found many high m____【小题4】 buildings instead of old ones. He also found that many people spoke English but not Italian and that many street signs were w____ 【小题5】 in English.
Paul knew very l____【小题6】 English. So he asked a policeman in Italian the way to the bus station. He happened to meet a policeman who was also born in Italy and answered in the same l____【小题7】.
After twelve hours’ traveling round on a bus, the driver handed him over to a____【小题8】 policeman. But this time, this policeman could only speak English. So paul asked the policeman why the Rome police employed(雇佣)so many people who spoke English as policemen.
Paul didn’t b____【小题9】 he was in New York when he was told so. To get him on a plane to Italy, he was s____【小题10】 to the airport in a police car.

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短文填空 (共10分,每空1分)

come, fall, sit, look, be, walk, jump, sell, hear, drop

  根据短文内容,用方框中所给词的正确形式填空,使短文完整、正确。(每个词只能用一次)(共10分,每小题1分)

  Early in the morning, Mr. Black was carrying a big basket of cabbages to the market. She hoped 1.___them to the people from town.

  The mountain road was narrow(狭窄的)and the old woman 2.___carefully. Suddenly she 3.___a loud bell. It passed her and very fast down the hill. The old woman had to 4.__to one side of the road so quickly that the basket of cabbages nearly 5.___into the valley.

  She saw a young boy 6..___on the bicycle without even 7.___round to see if the old woman was all right.

  The old woman shouted, 8.___back.”

  “What 9.___it?” the boy asked impolitely, pushing his bike towards the old woman.

  “What did I drop?”

  “Little boy, you 10.___your manner.” The old woman answered.

 

 

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根据题意补全下列单词

1.W    you like to go to the cinema??

2.That's a great i   .?

3.—W    is the film??

—On Sunday.?

4.—W    is the magic show??

—At Sun Theatre.?

5.S    is the last day of the week.

 

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