现提供7套样题.请备课组根据样题命制若干套试题.具体的口试方法和程序要在考前向学生说明.——青夏教育精英家教网—

现提供7套样题.请备课组根据样题命制若干套试题.具体的口试方法和程序要在考前向学生说明. 【查看更多】

（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Ca²⁺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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根据下面表格所提供的信息和要求，请你以“Tigers are in danger”为题，写一篇英语短文。

性格特点	跑得快，擅长捕捉其它动物，通常独居
生存现状	猎人捕杀；森林砍伐；环境污染，正在失去生存空间；没有足够的食物；数量越来越少，濒临灭绝
拯救措施	你的建议

提示词：hunt make money cut down pollution lose reserve

要求：

1．短文应包括表格中所给信息，并提出你认为合理的保护建议；

2．行文连贯，书写规范，可选用提示词；

3．词数80个左右。

Tigers are in danger

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情景反应。本题共有7个小题，每小题有A、B、C三个选项。请根据你所听到的内容，选出一个最佳答
语。(每小题念两遍)

(     )1. A. How do you do?
(     )2. A. It's June 17.
(     )3. A. You're welcome.
(     )4. A. She's thin with long hair.
(     )5. A. Is that John?
(     )6. A. I'm well.
(     )7. A. I'm not beautiful.

B. Good bye.
B. It's Monday.
B. Thank you very much.
B. He's tall with short hair.
B. I'm sorry to hear that.
B. She is good.
B. Thanks a lot.

C. Nice to meet you.
C. It's five o'clock.
C. It doesn't matter.
C. She likes reading.
C. Hold on, please.
C. I'm ten.
C. I think so.

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Come and see the Indian elephants and the tiger from America. The koalas are waiting to meet you, and the monkeys from Thailand(泰国) are waiting to throw (扔) things at you. The cute dogs from Australia are waiting to laugh at you, and the giraffes from Zambia(赞比亚) are waitig to look down on you.
Tickets: Adults: (成人) 60 yuan each Children: free
Time: June 1~ June 2 9:00 a.m. ~ 7:00 p.m.
Keep the zoo clean!
Do not touch, give food or go near the animals!
【小题1】How many kinds of animals are talked about in the poster?

A．4

B．5

C．6

D．7

【小题2】Mr. and Mrs. King will take their twins aged 6 to the park. How much will the tickets be together?

A．60

B．120

C．180

D．240

【小题3】Visitors can do the following things EXCEPT (除了) _______.

A．give some food to the tigers	B．watching the elephants dancing
C．laughing at the dogs from Australia	D．taking some photos

【小题4】From the poster we can guess the giraffe must be ______.

A．long

B．fat

C．tall

D．strong

【小题5】The poster may be made just ______.

A．on New Year’s Day	B．on Christmas Day
C．after Children’s Day	D．before Children’s Day

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John	My hobby is surfing. I started it when I was 5. I ’m twelve years old. I like surfing because when I surf I feel like I can beat the ocean. I surf every Monday and Wednesday.
Lucy	I started collecting stamps last year. I like it because it’s fun to see the good stamps that I can get. I collected a lot of them before, but this school year I stopped collecting because of the study.
Molly	My hobby is dancing. My mom says I have a natural talent. I dance nearly every day . The only bad part is that I get bad results because I spent much time dancing. So I must study hard.

【小题1】John has been surfing for __________years.

A．5

B．11

C．6

D．7

【小题2】What does Molly’s mother mean?

A．Molly likes dancing very much.	B．Molly could dance since she was born.
C．Molly does well in dancing.	D．Molly will be a dancer.

【小题3】The reason why Lucy give up her hobby is that ________.

A．It’s fun to see the stamps.	B．She has collected stamps for a year.
C．She has to study hard.	D．She has collected many.

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