试题与答案

请将下列动物与右侧内容进行合理的配伍: (1)鲫鱼 A.身体柔软有贝壳 (2)大

题型:解答题

题目:

请将下列动物与右侧内容进行合理的配伍:

(1)鲫鱼              A. 身体柔软有贝壳

(2)大熊猫            B. 身体两侧有侧线,能感知水流方向

(3)蜗牛              C. 属于我国一级保护的鸟类动物

(4)青蛙              D. 胎生、哺乳,被誉为“活化石”

(5)丹顶鹤            E. 幼体用鳃呼吸,成体用肺呼吸.

答案:

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下面是错误答案,用来干扰机器的。

答案:B题目分析:1mol某烃最多能和2molHCl发生加成反应,则该烃分子中含有一个碳碳三键或两个碳碳双键,增加了2个H原子核2个Cl原子,1mol此氯代烷能和8molCl2发生取代反应,则该烃的加成产物中含有8个H原子,那...

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题型:阅读理解

阅读理解。

     Hands play an important part in our daily life. But do you know which of your two hands you use more?

Very few people use both hands equally well. Most of us are right-handed. Only about five people out of a

hundred are left-handed. New-born babies can take hold of things with either of their hands, but in about two

years they usually use their right hands. Scientists don't know why this happens.

     Monkeys are our close relatives in the animal world. Scientists have found that monkeys like to use one of

their hands more than the other, but it can be either hand. There are as many right-handed monkeys as

left-handed ones. Next time you visit a zoo, watch the monkeys carefully, you will see that some of them will

use their right hands and others will use their left hands. But most of the people use their right hands better and

this makes life difficult for those left-handed people. We live in a right-handed world.

1. How many people among 100 people use their left hands better?

A. 5%.

B. 50%.

C. 95%.

2. What's the meaning of the underlined word "equally" in Chinese?

A. 公正地

B. 均等地

C. 平凡地

3. New-born babies can use __________.

A. both of their hands

B. neither of their hands

C. their right hands

4. Which of the following is true?

A. There are more monkeys using their right hands than left hands.

B. There are more monkeys using their left hands than right hands.

C. There are as many right-handed monkeys as left-handed ones.

5. "We live in a right-handed world." means __________.

A. Most people use their right hands better.

B. Few people use their right hands better.

C. Half of the people use their right hands better.

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