Question

【題目】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】

本文主要介紹了動物可以通過抖動來甩掉身上的水，小的動物每分鐘抖動的次數(shù)要比大的動物抖動次數(shù)多，甩掉身上的水能讓自己變干，也是為了能跑的快，能活的更久。

【1】細節(jié)理解題。句意：在不到一秒鐘的時間里，一只狗可以通過抖動甩掉身上多少水？

依據(jù)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%，故選答案C。

【2】推理判斷題。句意：根據(jù)短文，哪幅圖片是正確的？

依據(jù)第二段For example, in one second, a rat can shake 18 times, a 6 times, and a 4 times.可知，按照每秒鐘內(nèi)抖動的次數(shù)由多到少的順序應該是rat, dog, bear. 故選答案D。

【3】細節(jié)理解題。句意：為什么動物抖動讓自己變干？

依據(jù)最后一段Being wet makes animals heavier, and that makes it harder to run.可知，身上濕了就不能跑快，if an animal is not able to run very fast, it may not live long.跑不快，動物就不能活的長久，以此可知，讓自己變干是為了跑的快。故選B。

【4】推理判斷題。句意：我們可以從文中學到什么？

C.大的動物比小的動物每次抖動能讓自己更干，依據(jù)第二段Bigger animals can get their bodies dry with fewer shakes.可知C項是正確的。A, B.選項文章都沒提及；D.洗衣機的原理來自狗的抖動，文中提到his common act of dogs works better than a washing machine.比洗衣機抖動的好，不是洗衣機原理來自狗的抖動；故選C。