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This growth,()mainly in Southeast Asia and Africa, has dramatic consequences.

A. happens
B. which is happening
C. which happening
D. which happened

喷水分级法将防污闪涂料表面的憎水性状态分为()级。

A. 5
B. 6
C. 7
D. 8

在Word 2003中,按Ctrl+V组合键与工具栏上的()按钮功能相同。

“忽如一夜春风来,千树万树梨花开。”这是岑参()中的名句。

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