My sister hates the films ________ have too much fighting. [ ]
A. that
B. what
C. they
答案:A
下列有关操作与现象的描述与相应溶液不符合的是( )
烟花爆竹产品C级产品引燃时间为()
A.2~5s
B.3~5s
C.3~8s
D.6~12s