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【题目】全球变暖已是不争的事实,同时越来越多的证据表明,与之相伴随的还有全球变暗,即地球大气中的悬浮颗粒物增加,云层变厚,能够直接到达地球表面的阳光逐渐减少,地球因此而变得越来越。据此完成下列问题。

【1】引起全球变暖全球变暗的主要人为原因都是

A.太阳辐射能力在减弱

B.使用化石燃料等排放出大量微粒物

C.火山喷发产生的火山灰

D.沙尘暴肆虐全球

【2】全球变暖将导致多方面的变化,下列变化不可能的是

A.海平面上升

B.暴雨、洪涝、干旱等灾害事件增加

C.冰川覆盖面积扩大

D.对人类健康的威胁会增加

【答案】

【1】B

【2】C

【解析】

试题分析:

【1】温室气体对来自太阳辐射的可见光具有高度透过性,太阳辐射不会减弱,故不符合题意;A错误;由于人们焚烧化石燃料,如石油,煤炭等,或砍伐森林并将其焚烧时会产生大量的二氧化碳等温室气体,这些温室气体对来自太阳辐射的可见光具有高度透过性,而对地球发射出来的长波辐射具有高度吸收性,导致地球温度上升人们焚烧化石燃料,如石油,煤炭等,产生大量的粉尘,使得地球大气中的悬浮颗粒物增加,云层变厚,能够直接到达地球表面的阳光逐渐减少,地球因此而变得越来越“暗”.故B正确;火山灰和沙尘暴肆虐不是人为原因CD错误

【2】

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