室内空气中有酸碱成分的室内墙面,应使用哪种油漆().
A.调和漆
B.清漆
C.过氯乙烯漆
D.乳胶漆
参考答案:C
解析:
过氯乙烯漆为溶剂型涂料,常用于防腐工程。
---- Does your brother study in Beijing University?
---- No, not now. But he ________ there for 7 years.
A.would study
B.studied
C.has studied
D.was studying
The MOST important element in administering CPR is().
A.having the proper equipment for the process
B.starting the treatment quickly
C.administering of oxygen
D.treating for traumatic shock