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　　2020年9月四级听力试卷解析

　　石家庄学校 曹雅雯孙香溢

　　【试题】

　　News Report one

　　A NASA satellite orbiting over Portugal took photographs that reveal the effects of pollution from ships. One of the photos shows the thin film of clouds above the brilliant blue of North Atlantic cut by white lines of thicker clouds that look like scars. [1] NASA officials explained those thicker clouds are signs of ship traffic blow. when ships power their ways through the ocean, they pump exhausts into the atmosphere, just as cars do. And those massive amounts of particles can cause clouds to form. Get enough of those particles in one place, as from the exhausts of the ship, and they can lead to the creation of new clouds easily visible from space, these clouds can be huge. Some of them stretch hundreds of kilometers from end to end, NASA officials said. [2] It’s likely that these sorts of clouds are having some effect over global climate, according to NASA officials. But scientists are not yet sure what effects it has.

　　【文章解析】

　　话题方面，本文是以自然科技为主题的新闻，主要讲述了船只带来的污染问题。原文难度适中，听出信号词后方可定位选项。考生首先务必要把握首句的中心词ship以及pollution，这样有助于听懂后续文章。题目方面，两道题都是细节题，紧扣主题。这两道题均在专家(研究)处设题。词汇方面，文章没有太多专业术语，只需要注意satellite，particle，exhaust这几个科技方向词汇以及NASA这一专有词汇即可。建议考生把握首句，注重宏观层面的理解。

　　【题目解析】

　　Question 1: 通过题干得知是问“美国国家航空和宇宙航行局(NASA)的卫星拍摄照片中的密云(thick cloud)是什么”?那么在寻找答案时要在原文中先听到关键词thick cloud，然后去后面听取客观事实性信息。根据关键词“thicker clouds”可以定位至该词后面的那句“NASA officials explained those thicker clouds are signs of ship traffic flow.”，即“NASA官员解释道，这些较厚的密云是船舶交通流量的标志。”。由此可定位至正确选项“B) Ship traffic in the Atlantic.”

　　Question 2: 通过题干得知是询问这些密云的影响。根据关键词“these sorts of clouds are having some effect on...”可以定位至原文倒数第二句“It's likely that these sorts of clouds are having some effect on the global climate, according to NASA officials.”，即“NASA官员表示，这些云很可能对全球气候产生了一些影响。”。因此，选项“C) They may be affecting the world's climate.” 是正确答案。其中的world与global是同义替换。