Question

阅读下列短文，从每题所给的四个选项(A. B. C和D)中，选出最佳选项，并在答题卡上将该项涂黑。

Dolphins (海豚) are not fish, but warm-blooded animals. They live in groups, and speak to each other in their own language. In this way they are like other animals, such as bees and birds. But dolphins are very different from almost all land animals. Their brain is nearly the same size as our own, and they live a long time — at least twenty or thirty years.

Like some animals, dolphins use sound to help them find their way around. They also make these sounds to talk to each other and to help them find food. We now know they do not use their ears to receive these sounds, but the lower part of the mouth, called the jaw.

Strangely, dolphins seem to like man, and for thousands of years there have been stories about the dolphin and its friendship with people.

There is a story about sailors in the 19th century. In a dangerous part of the sea off the coast of New Zealand, they learnt to look for a dolphin called Jack. From 1871 to 1903 Jack met every boat in the area and showed it the way. Then in 1903 a passenger on a boat called The Penguin shot and wounded Jack. He recovered and for nine years more continued to guide all ships through the area－except for The Penguin.

Today, some people continue to kill dolphins, but many countries of the world now protect them and in these places it is against the law to kill them.

1.By telling the story of Jack the writer wanted to show that ________.

A. people are cruel to animals

B. dolphins are friendly and clever

C. Jack is different from other dolphins

D. dolphins should be protected by law

2.Dolphins are different from many other animals in that they ________.

A. live in groups             B. have their own language

C. are warm-blooded           D. have large brains

3.Which of the following does the dolphin use to help it find its way around?

A. Its mouth.                B. Its ears.

C. Its nose.                 D. Its eyes.

4.Why did the sailors off the coast of New Zealand look for Jack?

A. They wanted his help.

B. They enjoyed playing with him.

C. He was seriously wounded.

D. He was lonely and liked to be with people

Answer

1.B

2.D

3.A

4.A

【解析】

试题分析：本文介绍了海豚，并举例说明海豚是人类的朋友。

1. 主旨大意题。Jack的例子着重描述了海豚的聪明与友好，故选B。

2. 细节理解题。由第一段第五句Their brain is nearly the same size as our own.可知，海豚与其他动物最大的不同就是他们的脑子和人类的脑子几乎一样大，故选D。

3. 细节理解题。由第二段Like some animals, dolphins use sound to help them find their way around. They also make these sounds to talk to each other and to help them find food. We now know they do not use their ears to receive these sounds, but the lower part of the mouth, called the jaw.可知，海豚是通过声音确定方向的，但是它们并不是通过耳朵来接收声音，而是通过嘴的下部，也就是下巴，故选A。

4. 细节理解题。由第三段Jack met every boat in the area and showed it the way.可知，海员们寻找Jack的原因是Jack为这些航船在危险航段导航，故选A。

【名师点评】以细节题的考查为主，要求考生准确阅读文章，在确定考查内容所在文章位置的时候，要根据上下文的语义串联来确定答案。

考点：考查科普类阅读