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【单选题】
The reference to the 'Gordian knot' (para. 5) suggests that the author thinks thatA.
barter was inherently too slow
B.
it was difficult to change the barter system to a monetary system
C.
the economist Gordon deserves credit for introducing the monetary system
D.
most people lack the skill to accurately determine the value of commodities
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举一反三
【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.
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