Step 1 Review 第一步 复习 (分小组向全班同学汇报上节课的作业.教师准备一些垃圾并做些动作.学生判断正误.并纠正老师的行为.既激发兴趣复习上节课内容又进行环保教育.) T: Look at this plastic bottle. It’s empty and useless. Let’s throw it away. Ss: Mr./Miss-, you are wrong. T: Why? Ss: Because it can be reused. T: Here is a can. It’s not useful. S1, please throw it out of the window. S1: Sorry. Mr./Miss-, I can’t do that. We must protect our environment and it can be collected and recycled. T: What a greener person! (老师指着灯.然后指着开关做关灯手势) Oh, the light is still on. S2, would you please turn it off? S2: Sure. (板书并让学生猜其意思.要求掌握) turn off turn on T: It’s a good habit to turn off the lights when you are not using them. About protecting the environment, what are other good habits? Do you know? S3: We can reduce the waste we produce. S4: We should use both sides of paper. S5: Reuse plastic bags rather than throw them away. - Step 2 Presentation 第二步 呈现1. (教师做补充并导出新单词) T: We ought to save every drop of water. We had better walk or ride a bike while we’re travelling a short distance. Take a cloth bag or a basket instead of plastic bags when you go shopping. (板书并让学生猜其意思.要求掌握ought to) ought to=should travel a short distance cloth T: Everyone should do it like this every day, but easier said than done. (板书并让学生猜测这个句子的意思.) Easier said than done. T: Would you do as what you said? Ss: Yes./Sure. T: OK. Actions speak louder than words. (板书并让学生猜测其意思.且要掌握action.) Actions speak louder than words. 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____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____2., he got off the plane.

    When nobody was there to meet him, Paul thought maybe the heavy t____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____4. buildings instead of old ones. He also found that many people spoke English but not Italian and that many street signs were w____ 5. in English.

    Paul knew very l____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____7..

    After twelve hours’ traveling round on a bus, the driver handed him over to a____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____9. he was in New York when he was told so. To get him on a plane to Italy, he was s____10. to the airport in a police car.

 

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在下列给出的单词中,选出最适合的一个填写在横线上

go do have study play talk ride listen?

1. At three o'clock, we take a break and________ to some students.

2. The twins _______ to the cinema on Sunday evening.

3.On Saturday evening, Lingling and Kitty________ to music.

4. Daming and Tony ________ football on the playground on Saturday afternoon.

5. The pupils go home at four o'clock and ________ homework.

6. We don't_________ chemistry, art or history on Thursday afternoon.

7. The students _________ English at school.

8. We_______ to school every day. It is far(远).

 

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补全对话(共5分)

  从方框内选择恰当的句子完成下面的对话。(共5分,每小题1分)

A. A table for two?

B. What can I do for you?

C. My I take your order now?

D. Excuse me. Could we have some coffee, please?

E. This way, please.

F. Anything else?

G. What would you like to drink?

  Waiter: Good morning, madam.

  Gina: Good morning.

  Waiter: 1._____________

  Gina: Yes. Can we have table by the window?

  Waiter: OK. 2. _____________

  ( At the table )

  Waiter: Here's the menu. 3.__________

  Gina: Yes. We'd like chicken with potatoes, beef with onions and some rice.

  Waiter: 4.__________

  Gina: Orange juice.

  Waiter: 5.________

  Gina: No, that's all. Thank you.

 

 

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