Ordinary woman though she is, she has won the award because she tries every means to make

people _______ of the importance of the environment conservation.[      ]

A. aware        

B. careful      

C. sensible    

D. ambitious

钢梁涂膜粉化劣化达（）级时，应清除涂层表面污渍，用细砂纸除去粉化物，然后覆盖相应的面漆二道。

A.2

B.3

C.4

D.5