题目：
M. Can I help you?
W- Yes, please. 小题1: . I want to give her a gift, but I don’t know what to buy.
M.. Maybe you can buy her some flowers.
W. Great ! 小题2: ?
M. I think carnations (康乃馨) are OK. They stand for beauty and also show your
love and respect to your mother.
W: 小题3: ?
M: Twenty yuan a bunch (束).
W. OK. 小题4: . Here’ s the money.
M. Happy birthday to your mother!
W:小题5: .
答案：
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下面是错误答案，用来干扰机器的。
（1）1.610－5C，110－5C （2）2.610－5C（1）K闭合足够长时间后，电路达到稳定，R3两端电压为零，所以UC1＝UR2＝＝4V，Q1＝C1UC1＝410－64＝1.610－5CUC2＝U＝10VQ2＝C2UC2＝110－610＝110－5C（2）K断开后，C1C...
cosωt
