Question

【题目】D

When we get wet, we need a towel to get ourselves dry. When a dog gets wet, all it needs is to shake its body. A study in 2010 showed that a wet dog could throw off(甩掉) half the water on its body by shaking for less than a second. In fact, this common act of dogs works better than a washing machine.

The study found that animal shaking begins with the head and ends with the tail(尾巴). Smaller animals must shake faster than bigger animals to get water off. For example, in one second, a rat can shake 18 times, a dog 6 times, and a bear 4 times. Bigger animals can get their bodies dry with fewer shakes.

For animals, shaking is not just about getting themselves dry. It is also about saving their lives. Being wet makes animals heavier, and that makes it harder to run. In the animal world, if an animal is not able to run very fast, it may not live long. Maybe that's why the wet-dog shake" has become a common habit of many animals.

【1】How much water can a wet dog throw off from its body by shaking in less than a second?

A.10%B.30%C.50%D.70%

【2】From the reading, which picture is probably right?

A.B.

C.D.

【3】Why do animals shake themselves dry?

A.To show their love to other animals.

B.To help themselves run faster.

C.To help themselves get more water.

D.To make other animals scared.

【4】What can we learn from the reading?

A.The animal's tail can help it run more quickly and easily.

B.Some animals shake more than they need to get water off.

C.Larger animals get drier at each shake than smaller animals.

D.The idea of washing machines came from the dogs' shaking.

Answer 1

【答案】

【1】C

【2】D

【3】B

【4】C

【解析】

本文主要介绍了动物可以通过抖动来甩掉身上的水，小的动物每分钟抖动的次数要比大的动物抖动次数多，甩掉身上的水能让自己变干，也是为了能跑的快，能活的更久。

【1】细节理解题。句意：在不到一秒钟的时间里，一只狗可以通过抖动甩掉身上多少水？

依据第一段A study in 2010 showed … half the water on its body by shaking for less than a second.可知，狗可以甩掉身上水的一半，也就是50%，故选答案C。

【2】推理判断题。句意：根据短文，哪幅图片是正确的？

依据第二段For example, in one second, a rat can shake 18 times, a 6 times, and a 4 times.可知，按照每秒钟内抖动的次数由多到少的顺序应该是rat, dog, bear. 故选答案D。

【3】细节理解题。句意：为什么动物抖动让自己变干？

依据最后一段Being wet makes animals heavier, and that makes it harder to run.可知，身上湿了就不能跑快，if an animal is not able to run very fast, it may not live long.跑不快，动物就不能活的长久，以此可知，让自己变干是为了跑的快。故选B。

【4】推理判断题。句意：我们可以从文中学到什么？

C.大的动物比小的动物每次抖动能让自己更干，依据第二段Bigger animals can get their bodies dry with fewer shakes.可知C项是正确的。A, B.选项文章都没提及；D.洗衣机的原理来自狗的抖动，文中提到his common act of dogs works better than a washing machine.比洗衣机抖动的好，不是洗衣机原理来自狗的抖动；故选C。