It can be inferred from the passage that______.
A.the atmosphere has a lot of water when it circulates
B.the water in the atmosphere is purer than that in the world's oceans
C.the amount of water in the atmosphere is greater than that in the oceans of the world
D.the small 'amount of water in the atmosphere plays an important part in the rainfall on the earth
第2题
高分子化合物以分子分散的是
A.溶液型液体制剂
B.高分子溶液剂
C.溶胶剂
D.混悬剂
E.乳剂
第9题
由高分子化合物分散在分散介质中形成的液体制剂是
A.低分子溶液剂
B.高分子溶液剂
C.溶胶剂
D.乳剂
E.混悬剂
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