The students respect their head teacher       ，although she is strict，she is fair．

A．since

B．for

C．that

D．because

对洪水浸泡过的教室常用哪种消毒剂消毒。（）

A.酒精

B.漂白粉

C.过氧乙酸

D.新洁尔灭

E.甲醛