Question

阅读理解 　　“The noise made by boats of whale watching tourists may be causing communication problems for the animals,” British researchers said last week． 　　Whale-watching is a popular tourist activity in places where groups of killer whales(虎鲸)live．Every day, dozens of boats filled with tourists go to watch the beautiful animals．Unfortunately, the engines of the boats make a lot of noise, and that may be causing problems for the whales, according to a report in the US science magazine Nature． 　　The whales travel in groups, and communicate with each other through sonic(声波的)calls that some scientists refer to as singing．The sounds of the boat engines may be creating too much background noise for the whales to be able to hear each other． 　　The researchers listened to recordings of whale calls made between 15 and 25 years ago, before whale watching became popular．These were compared to more recent recordings． 　　They found that the animals have started to sing for longer than they used to, like a person shouting to a friend across a noisy room． 　　It is believed that the whales are trying to communicate hunting or breeding(繁殖)information．Scientists said that, if this is prevented, the future of the world’s whale population could be in danger． 　　“Animals become slow in mind and repeat themselves in noisy areas, ” said Volker Deecke, a Canadian biologist．“They have to say things twice or three times in order to be understood．”? 　　The killer whales studied were living off the coast of northwestern America．The number of killer whales in this area has been falling for several years, but scientists are not sure why． (1) The passage mainly tells us ________． [　　] A． the problems of whale-watching B． how killer whales communicate with each other C． the reduced population of killer whales caused by whale-watching D． hearing problems of the killer whales caused by whale-watching (2) Now in a noisy background, the killer whales have to ________． [　　] A． sing in a louder voice B． travel in smaller groups C． sing longer D． get nearer to each other (3) Scientists believe that killer whales sing to ________． [　　] A． warn each other of dangers B． keep in the same group C． enjoy themselves D． send useful information (4) From the passage, we can feel that the author is ________． [　　] A． worried B． hopeful C． angry D． disappointed

Answer 1

答案：1．D;2．C;3．D;4．A;
解析：

(1)	主旨归纳题。概括文章第一段可得出答案。观鲸船的噪音给虎鲸的信息交流造成了麻烦。A项所涉范围过大；B项仅仅是文章的细节；C项与原文信息不符，因为文章最后说明虎鲸数量下降的原因不明。
(2)	细节理解题。文章第五段说明，因为受噪音干扰，现在虎鲸“唱”的时间比原来长。
(3)	细节理解题。文章倒数第三段有说明，虎鲸的“唱歌”是为了交流捕食或繁殖信息。
(4)	推理判断题。文章介绍观鲸船的噪音给虎鲸的交流造成了困难，从文章最后的叙述看，虎鲸数量在下降，而科学家也不明白其中原因，因此显然作者对虎鲸的生存状况感到“担忧”。