15.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 use 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 1871to 1903Jack met every boat in the area and showed it the way.Then in 1903a 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.
24.Dolphins are different from many other animals in that theyD.
A.live in groups
B.have their own language
C.a(chǎn)re warm-blooded
D.have large brains
25.Which of the following does the dolphin use to help it find its way around?A
A.Its jaw.
B.Its ears
C.Its nose.
D.Its eyes.
26.By telling the story of Jack the writer wanted to show thatC.
A.people are cruel to animals
B.Jack is different from other dolphins
C.dolphins are friendly and clever
D.dolphins should be protected by law
27.Why did the sailors off the coast of New Zealand look for Jack?A
A.They wanted his help.
B.They enjoyed playing with him.
C.He was lonely and liked to be with people
D.He was seriously wounded.
分析 本文介紹了海豚的情況,文中詳細介紹了海豚的生活習性及其他的情況,并舉例說明海豚是人類的朋友.
解答 24.D.細節(jié)理解題.由第一段第五句Their brain is nearly the same size as our own,可知海豚與其他動物最大的不同就是他們的腦子和人類的腦子幾乎一樣大,故選D.
25.A.細節(jié)理解題.由第一段第六句dolphins use sound to help them find their way around.可知海豚是通過聲音確定方向的,故選A.
26.C.推理判斷題.細節(jié)理解題.根據(jù)文章Like some animals,dolphins use sound to help them find their way around.They also use these sounds to talk to each other and to help them find food可知全文都在講海豚的聰明與友好,故選C.
27.A.推理判斷題.由第三段Jack met every boat in the area and showed it the way.可知海員們尋找Jack的原因是Jack為這些航船在危險航段指明方向,故選A.
點評 考察學生的細節(jié)理解和推理判斷能力,做細節(jié)理解題時一定要找到文章中的原句,和題干進行比較,再做出正確的選擇.在做推理判斷題不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進行合乎邏輯的推理判斷.