问题
选择题
Bad weather prevented the work ____ in time. [ ]
A. completed
B. from completing
C. to be completed
D. being completed
答案
答案:D
Bad weather prevented the work ____ in time. [ ]
A. completed
B. from completing
C. to be completed
D. being completed
答案:D
北京奥运会为确保“水立方”的水质达到国际泳联最新卫生标准,泳池的水将采用砂滤→臭氧→活性炭净水工艺进行处理,其中砂滤、臭氧、活性炭的作用分别是( )
A.过滤、消毒、吸附 | |
B.吸附、消毒、过滤 | C.过滤、漂白、吸附.m |
D.杀菌、漂白、吸附 |