I am late, ____?
A.aren't I
B.aren’t you
C.are you
D.am i
答案:A
本句中的I am常常用aren't来反问。
—___ _?
—Yeah, it seemed a little confusing to me at first, but now I get it.
A.Can you give me a moment
B.See what I mean
C.Are you stuck
D.Can you go on.
下列方法中,不能使滴定终点更明显的是()。
A.选用合适的指示剂
B.采用较浓的试液
C.采用较浓的标准液
D.延长指示剂显色时间