题目内容
16.Some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings.The noise that affects sea creatures comes from a number of human activities.It is caused mainly by industrial underwater explosions,ocean drilling,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.Some scientists have suggested setting a noise limit of one hundred and twenty decibels in the oceans.They have observed that noises at that level can frighten and confuse whales.A team of American and Canadian scientists discovered that louder noises can seriously injure some animals.
The research team found that powerful underwater explosions were causing whales in the area to lose their hearing.This seriously affected the whales'ability to exchange information and find their way.Some of the whales even died.The explosions had caused their ears to bleed and become infected.
Many researchers whose work depends on ocean sounds are against 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 don't think that noise is a greater danger than they believed.They want to prevent noises from harming creatures in the ocean.
51.According to the passage,which of the following is increasingly dangerous to sea creatures?D
A.The sound of cars. B.The sound of voices.
C.The sound of steps D.Man-made noise pollution.
52.According to the passage,natural sounds include all of the following EXCEPT
A.
A.ocean drilling B.sounds made by animals themselves
C.underwater earthquakes D.the breaking of ice fields
53.Which of the following is discussed in the third paragraph?B
A.Different places may have different types of noises
B.The same noise level produces a different effect on land and in the ocean.
C.The decibel is not a right unit (单位) for measuring underwater noise.
D.Different ocean animals may have different reactions to noises.
54.Which of the following is true of whales?B
A.They won't be confused by noises.
B.Their hearing will be damaged by high-level noises.
C.Their ability to reproduce will be lowered by high-level noises.
D.They are deaf to noises.
55.According to the passage,what will scientists most probably do in the future?
C
A.They will work hard to reduce ocean noise pollution.
B.They will try to set a limit of 120 decibels.
C.They will protect animals from harmful noises.
D.They will study the effect of ocean noise pollution.
分析 本文是一篇科教类阅读,主要讲的是海洋噪音污染对海洋生物的影响.
解答 51-55 DABBC
51题答案:D考查细节推理,根据文章第一段的Some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings.(一些科学家指出海洋里的动物越来越受到人类造成的噪音威胁).可知本题答案为D选项.
52题答案:A考查细节推理,根据第二段的The noise that affects sea creatures comes from a number of human activities.It is caused mainly by industrial underwater explosions,ocean drilling…(影响海洋生物的噪音来自很多的人类活动,包括工业水下探索、海洋钻井…).可知A选项不属于自然声音,故本题答案为A选项.
53题答案:B考查细节推理,根据文章第三段的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.(一百二十分贝的噪音会使人耳疼痛,在水下一百九十五分贝的噪音产生的影响是一样的).由此可知第三段讨论的是在水下和陆上同一分贝等级会产生不同的影响,故本题答案为B选项.
54题答案:B考查细节推理,根据第三段的The research team found that powerful underwater explosions were causing whales in the area to lose their hearing.(研究团队发现强烈的水下爆炸会导致该地区的鲸鱼失去听力).可知本题答案为B选项.
55题答案:C考查细节推理,根据最后一段最后一句的They want to prevent noises from harming creatures in the ocean.(他们想要保护海洋生物免遭噪音的危害).可知本题答案为C选项.
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对 性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.

Canton Fair attracts more than 24,000China's best foreign trade companies with good credibility and sound financial capabilities,and 500overseas companies to participate in the Fair.
Canton Fair is a platform for import and export mainly,with various and flexible patterns of trade.Beside traditional way of negotiating against samples,the Fair holds Canton Fair Online.Various types of business activities such as economic and technical co-operations and exchanges,goods inspection,insurance,transportation,advertising and consultation are also carried out in flexible ways.Business people from all over the world are gathering in Guangzhou,exchanging business information and developing friendship.
Events Schedule of the 115th Session of Canton Fair
Time:May 1st 14:00-16:00 Place:No.8Meeting Room,B Floor,Area B Event:Training Seminar of Overseas Marketing Theme:Market Segmentation And Channel Building Details:Cloris,Project Facilitator,Trade for Sustainable Development of International Trade Centre (ITC) |
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A.every season B.twice a year C.once a year D.every two years
26.If you want to visit the clothing show,you can be thereA.
A.on May 2nd 14:00-16:30 B.on May 1st 14:00-16:00
C.on May 1st 8:00-16:30 D.on May 2nd 10:00-16:00
27.What is the main purpose of the text?C.
A.To report the trade achievements.B.To present overseas investment.
C.To introduce the Canton Fair.D.To teach businessmen trade skills.