A.① | B.② |
C.③ | D.④ |
A.① | B.② |
C.③ | D.④ |
A.①② | B.③④ |
C.①③ | D.②④ |
A.① | B.② |
C.③ | D.④ |
A.减弱地面辐射,保持地温 | B.反射太阳辐射,降低地温 |
C.反射太阳辐射,增加光效 | D.吸收太阳辐射,增加地温 |
A.臭氧 | B.尘埃 |
C.水汽 | D.二氧化碳 |
A.① | B.② |
C.③ | D.④ |
A.① | B.② |
C.③ | D.④ |
A.①减弱 | B.②增强 |
C.③增强 | D.④增强 |
A.③减弱 | B.②增强 |
C.①减少 | D.④增强 |
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