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【题目】在全球普遍进入工业化的近100年来,地球平均地表气温升高了0.74 ℃。如果升温1 ℃,澳大利亚大堡礁的珊瑚将会全部死亡;升温2 ℃,将意味着格陵兰岛的冰盖彻底融化,海平面上升7米。据此完成下列问题。

1】造成上述现象的主要原因不包括

A.大量使用煤、石油

B.森林特别是热带雨林大量被砍伐

C.家庭广泛使用太阳能热水器

D.大量草场被破坏,草场沙化

【2气候变化的原因还可能引起

A.荒漠地区将变得湿润B.海平面下降

C.温带地区粮食产量下降D.北温带耕作区向高纬度延伸

【答案】

1】C

2】D

【解析】

1】材料中描述的现象是全球气候变暖引起全球气候变暖的主要原因是燃烧煤、石油等矿物质和破坏植被造成的。

2】由于气温升高,蒸发旺盛,荒漠可能会变得更加干旱,A项错误;冰川融化和海水膨胀,会导致海平面上升,B项错误;因热量增多,生长期延长,温带地区的粮食可能会增产,C项错误;北温带耕作区向高纬延伸,D项正确。

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