C. He’s looking for another job.

　　D. He’s playing computer games.

　　60. According to the text, FaceBook tends to　.

　　A. present another side of people

　　B. offer some foods for free

　　C. show endless advertisements

　　D. get you to more parties

　　C

　　(2017·珠海摸底)

　　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(鲸鱼).

　　A team of American and Canadian scientists discovered that louder noises can seriously injure some animals.

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