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【单选题】
-- Excuse me. ________? --That's $ 5 altogether, sir.A.
Can 1 order, please
B.
Could I have the bill, please
C.
How much is the meal we've had
D.
Please count the money, will vim
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【简答题】矩阵的行向量组的秩与 相等,对矩阵施行 不改变矩阵的秩。
【单选题】—You look great! Were you on vacation or ________？ —You got it. I've just come back from America.
A.
anything
B.
nothing
C.
everything
D.
something
【单选题】听力原文：M: Excuse me, Miss. I'm a graduate student of mathematics. I've just come from Japan, and I've never been to a Western library before. I wonder if someone might have time to show me around? W: I'...
A.
Making an appointment.
B.
How to use the library.
C.
Coming back about 4:00.
D.
How to choose a course.
【单选题】正弦交流电中,纯电阻电路的无功功率是 。
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