2020年9月四级英语听力真题及答案（听力原文及音频）

　　四级考试真题解析观看直播 写作真题及答案解析 翻译真题及答案解析 听力真题及答案解析 阅读真题及答案解析 　　以下内容是2020年大学英四级听力试题及答案，供各位考生参考！新东方网四六级频道第一时间更新公布英语四六级真题答案。同时广大考生还可随时@新东方网四六级微博，与线上老师以及考生随时互动答疑，敬请广大考生密切关注2020年9月英语四六级真题解析专题。 

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　　Section A

　　News Report 1

　　A NASA satellite orbiting over Portugal took photographs that reveal the effects of pollution from ships. One of the photos shows a thin film of clouds above the brilliant blue of the North Atlantic, cut by white lines of thicker clouds that look like scars.

　　NASA officials explained those thicker clouds are signs of ship traffic below. 【Q1】When ships power their ways through the ocean, they pump exhaust 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 exhaust of a 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”, NSAS officials said.

　　【Q2】It’s likely that these sorts of clouds are having some effect on the global climate, according to NASA officials. But scientists aren’t yet sure what effect it has.

　　Q1: What has caused the thick clouds in the photos taken by a NASA satellite?

　　Q2: What do NASA officials think about the thick clouds?

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