听力原文：女：你看，又让你破费了。
男：哪儿的话，咱俩谁跟谁呀!
问：男的的意思是什么?
(29)

M: Thank God! I’ve finished writing that annual report! It takes me almost a whole week. Well, no more overtime, and no more headaches!W: Well, I’m glad to hear it. Have a cup of coffee!Q: What are they talking about?（）

A．Work load.
B．Writing the service guide.
C．Coffee.
D．Holiday plans.

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已知干空气的组成成分的体积分数为氧气21％、氮气78％、氩气1％，试求干空气在压力为9．81×104Pa及温度为100℃时的密度。（） 点击查看答案