问题
选择题
目前，在地球的南极上空出现了臭氧空洞，其元凶是（ ）
A．地球的温室效应
B．人类使用的空调，冰箱中逸出的氟利昂等物质
C．阳光中的大量紫外线作用
D．大气中的二氧化碳浓度超标
答案
答案：B
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目前，在地球的南极上空出现了臭氧空洞，其元凶是（ ）
A．地球的温室效应
B．人类使用的空调，冰箱中逸出的氟利昂等物质
C．阳光中的大量紫外线作用
D．大气中的二氧化碳浓度超标
答案：B
| 选词填空 | |
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