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
