题目内容

【题目】将室温（25 ℃）饲养的某种体温为37 ℃的哺乳动物（动物甲）随机分为两组，一组放入41 ℃环境中1 h（实验组）另一组仍置于室温环境中（对照组）。期间连续观察并记录这两组动物的相关行为，如果：实验初期，实验组动物的静卧行为明显减少，焦虑不安行为明显增加，回答下列问题：

（1）实验中，实验组动物皮肤的毛细血管会___________，汗液分泌会___________，从而起到调节体温的作用。

（2）实验组动物出现焦虑不安行为时，其肾上腺髓质分泌的激素会__________。

（3）本实验中设置对照组的目的是__________。

（4）若将室温饲养的动物甲置于0 ℃的环境中，该动物会冷得发抖，耗氧量会_________，分解代谢会_________。

【答案】（1）舒张 增加 （2）增加

（3）排除41 ℃以外因素对实验结果的影响，以保证本实验的结果是由41 ℃引起的

（4）增加 增强

【解析】（1）炎热环境中，皮肤的毛细血管会舒张，汗液分泌增加；（2）出现焦虑不安行为时，肾上腺髓质分泌的肾上腺素增多。（3）对照实验是指除了一个因素以外，其余因素都保持不变的实验，即排除无关变量对实验结果的干扰。本实验中设置对照的目的是排除41 ℃以外的因素对实验结果的影响，以保证本实验的结果是由41 ℃引起的，更好的说明实验组的科学性。（4）寒冷环境中，皮肤的毛细血管会收缩，汗液分泌减少；细胞代谢加快，耗氧量增加。

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相关题目

【题目】 It was announced that only when the fire was under control ________to return to their homes.

A. the residents would be permitted

B. had the residents been permitted

C. would the residents be permitted

D. the residents had been permitted

【题目】翻译与仿写

1. In the farmyards, the chickens and even the pigs were too nervous to eat.

翻译：

________________________________________________________________________

仿写：活到老，学到老。

It is never ________________________________.

2. It seemed as if the world was at an end!

翻译：

________________________________________________________________________

仿写：他们谈起话来就像多年的老朋友。

They talked __________________________________ friends for years.

3. Thousands of families were killed and many children were left without parents.

翻译：

________________________________________________________________________

仿写：让他们待在地上吧。

________________ on the ground.

4. Everywhere they looked nearly everything was destroyed.

翻译：

________________________________________________________________________

仿写：她不管去哪里都拎着手袋。

She takes her handbag ________________________.

5. All hope was not lost.

翻译：

________________________________________________________________________

仿写：并不是所有的学生都能懂得这个。

________________________ understand this.

【题目】句型转换

在横线上填上适当的单词，使上下两句话的含义一致。（每空一词）

1. She was unlucky enough to get ill on vacation.

She was unlucky enough to ________ ________ on vacation.

2. First degree burns are not serious and should be better within a day or two.

First degree burns are not serious and should be better within _______ _______ ______ _______.

3. Second degree burns affect both the top and the second layer of the skin.

Second degree burns affect _______ _______ the top layer _______ _______ the second layer of the skin.

4. If we had gone to the party, we would have known the fact.

________ ________ ________ to the party, we would have known the fact.

5. If burns are on arms or legs, keep them higher, if possible.

If burns are on arms or legs, keep them higher, if _______ _______ possible.

【题目】单词拼写

根据首字母和汉语提示写出单词。

1. He a__________ her with money and advice.

2. She c __________ up and could not finish her speech.

3. Some people experience shyness as a b__________ to communication.

4. Industrial wastes are p__________ the atmosphere of the country.

5. They b__________ for their country and died happily.

6. He __________(挤) my handbag carefully but didn't find my little gun.

7. I would rather live without these __________(令人难以承受的)

8. The flesh around the ankle had __________(肿胀) up.

9. This project involves a lot of __________(复杂的) technical problems.

10. You might think her temper is as __________(温和的) as milk, but she is not.

【题目】语法填空

阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。

One evening, an elderly lady 1 (drive) past a small town when one of her tires suddenly blew out. Even though all she had was only a flat tire, it was __ 2 __ bad situation for a woman of her age. She was very ___3____ (annoy), especially with the weather ____4___ (get) colder and colder. At that moment, a man stopped his car in front of hers and asked ___5_____ she needed help. The old lady became even more nervous because the man looked poor and ____6____ (hunger). However, since no one else had stopped to help her during the past hours, she stood back and let him help her. After the man finished changing the tire, the lady was willing ___7____ (pay) him any amount of money. To her ___8_____ (astonish), the man replied that he just wanted to help her, just as others had helped him in the past. He didn’t want the lady to pay him back anything. Instead, he just wanted her to help others ___9___ need as well. Later that evening, the lady helped a heavily pregnant woman. It never 10___ (occur) to her that the woman was the poor man’s wife.

【题目】D

An international study of more than 13, 000 adults found that many people say modern technology has affected relations with their partners. Almost 40 percent of those questioned said their partners paid more attention to their mobile devices than to them.

The research included both old and new relationships. Thirty-three percent of those asked reported that they had to compete against a mobile device for attention on a first date.

Apparently, we have as much love for our digital devices as for the people we love. The survey found that adults spend almost equal amounts of time online at home as they do interacting directly. And a lot of married couples, friends and family members argue about time spent on mobile devices.

Rules or time limits on a device might be good, in theory. However, the survey found that 45 percent of those questioned do not set rules. Another 45 percent said they got into arguments about how much they are on their phones when spending time with loved ones. The lack of social rules about digital behavior might be the result of the newness of the issue.

Past generations did not have the technologies. In this situation, our elders know nothing. In fact, the knowledge and ability is moving towards the youngest generation that’s using the technology because they’re the ones bounding forward fearlessly, and finding out what ways they can get in trouble.

That trouble may include the sharing of sensitive information. The research found nearly 30 percent of couples share passwords to social media sites. This could be a problem when relationships end.

The study advises that people step away from electronic devices to truly connect with other people. Understand the value of distancing yourself from your device and allow yourself to be engaged with that person that means the most to you.

【1】What did the study find about modern technology?

A. People depend too much on it.

B. It breaks relations between partners.

C. Partners need it to develop relations.

D. It has a bad effect on human relations.

【2】What’s the problem with the digital device?

A. It takes up too much time.

B. It is dangerous to play.

C. It causes tiredness in married couples.

D. It takes away all love from loved ones.

【3】 What can be inferred from Paragraph 4?

A. People disagree with limiting mobile use.

B. Rules need to be made to limit mobile use.

C. The majority of users set rules to use a device.

D. More and more people will use phones wisely.

【4】What can be the best title for the text?

A. We Can’t Live Without a Cell Phone.

B. For Love, Put Aside the Phone!

C. How Powerful Electronic Devices Are!

D. Your Time Will Be Killed by the Phone.

【题目】根据你的生活经验和下表所提供的信息，分析并回答下列问题。

物理性质

物质性质比较

导电性(以银的导电性为100作标准)

银

铜

金

铝

锌

铁

铅

100

99

74

61

27

17

7.9

密度/(g·cm3)

金

铅

银

铜

铁

锌

铝

19.3

11.3

10.5

8.92

7.86

7.14

2.70

熔点/℃

钨

铁

铜

金

银

铝

锡

3410

1535

1083

1064

962

660

232

硬度(以金刚石的硬度为10作标准)

铬

铁

银

铜

金

铝

铅

9

4~5

2.5~4

2.5~3

2.5~3

2~2.9

1.5

(1)为什么菜刀、锤子等通常用铁制而不能用铅制？___________________。

(2)银的导电性比铜好，为什么导线一般用铜制而不用银制？_____________。

(3)为什么灯泡里的灯丝用钨制而不用锡制？_________________。

【题目】

短文改错。

其中共有10处语言错误，每句中最多有两处。。每处； 错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（＾），并在后面面的答线上写出该加的词。

删除：把多余的词用斜线(＼)划掉，再在后面的答题线上写出该词，并也用斜线(＼)划掉。

修改：在错误的词下画一条横线，并在后面的答题线写出修改后的词。

I learned early in life that I had to be more

patient and little aggressive. From the time 【1】

I was about four until I was about six, I destroyed

each of my toy. I was happy when the 【2】

toys worked, but when things did wrong, 【3】

I got angry and broke it. 【4】

For a while parents bought me new toys. 【5】

But before long they began to see which was happening.【6】

When I tear apart my fifth birthday toy train, 【7】

my father said, “That’s it. No more toys to you.” 【8】

My punishment lasted a year. Meanwhile, I found out

that with more patience I must make 【9】

my toys to last. My attitude changed from then on. 【10】

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