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What might be the mechanism of carbon dioxide

2022-08-01 22:33:24 问答库 阅读 167 次

问题详情

What might be the mechanism of carbon dioxide causing global warming?
A.Carbon dioxide takes in heat from the sun and heats the air around the earth.
B.Carbon dioxide makes it easy for the sunlight to go through the air and onto the earth.
C.Carbon dioxide prevents the heat from heating the air around the earth.
D.Carbon dioxide can trap the sunlight and make it cast onto the earth.请帮忙给出正确答案和分析,谢谢!

参考答案

正确答案:C
推断题。本题考查细节在第六段第二行“themainheat—trappinggas”。“heat—trapping”意为“将热量困住”或“不让热量轻易散失”,所以可以推断出二氧化碳导致温室效应的基本原理是“罩住了大量热量使之不易散失,从而使得气温升高”,故[C]为正确答案。[A]说二氧化碳吸收热量而使大气升温,这与“罩住热量”不是一回事,故排除;[B]说二氧化碳使得阳光容易穿过大气层而照射到地球上而导致升温,这也与其基本原理不符,故排除;[D]虽用到了原文的“trap”一词,但其“困住”的不是“热量”而成了“阳光”,表述错误,故排除。

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