题目内容
【题目】阅读理解
阅读短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Some scientists say that animals in the ocean are increasingly threatened by noise caused by human beings. The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial activities under the sea and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes and sounds made by animals themselves.
Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety-five would have the same effect (效果).
Some scientists have suggested setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales.
A team of American and Canadian scientists discovered that loud noises can seriously injure some animals. The research team found that powerful underwater explosions (爆炸) were causing whales in the area to lose their hearing. This seriously affected the whales’ ability to communicate and find their way. Some of the whales even died.
Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.
Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists suspect that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.
【1】 According to the passage, which of the following is increasingly dangerous to sea creatures?
A. The manmade noises.
B. The sound of earthquakes.
C. The sound of the icebreaking.
D. The noises made by themselves.
【2】 What is discussed in the second paragraph?
A. The ocean animals’ reaction to noises.
B. Human ears sensitive to all types of noises.
C. Different places with different types of noises.
D. The decibels measured differently on land and in the ocean.
【3】 What does the underlined phrase “object to” in Paragraph 5 probably mean?
A. Contribute to. B. Agree with. C. Be against. D. Put forward.
【4】 According to the passage, what will scientists most probably do in the future?
A. They will set a noise limit.
B. They will work hard to decrease noise.
C. They will study the effect of different noises.
D. They will protect animals from harmful noises.
【答案】
【1】A
【2】D
【3】C
【4】D
【解析】
科学家认为，人类海上活动导致的噪音污染对海洋生物的健康和行为产生了巨大的影响，甚至威胁到了他们的生存。虽然科学家不知道什么样的噪音对海洋生物有害，然而许多科学家怀疑噪声的危害要远远大于他们想象的程度，因此他们要努力去防止噪声对于海洋动物的危害。
【1】A 细节理解题。由第一段首句可知，海洋生物受到人为噪音的威胁日益严重，故A项正确。
【2】D 细节理解题。第二段的首句即为本段主旨句，故D项正确。
【3】C 词义猜测题。由第五段第二句可知，很多研究者认为限制分贝意味着很多重要的研究也不能做了，因此他们应该对此持反对态度，故C项正确。
【4】 D 细节理解题。由最后一段最后一句可知，科学家们会采取措施保护海洋动物免受噪音侵害，故D项正确。
