援外物资必须经检验检疫机构检验检疫合格后方可起运出境。 ( )
参考答案:对
---Is there anything I can do for you, sir?
---___________. But I’m being served.
A.Oh, you are a nice girl
B.That’s all right
C.It’s very kind of you
D.Thank you all the same.
滴定剂