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A.conventional CVD coating process
B.diamond CVD coating process
C.plasma-assisted CVD coating process
D.thin-film coatings
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第6题
What can we learn about the effects of acid rain on terrestrial plants？
A. Acid rain destroys the coating on tree leaves and fruits.
B. Acid rain makes tree leaves and fruits poisonous.
C. They are as clearly understood as the acid rain's effects on lakes.
D. Acid rain makes no difference on terrestrial plats.
