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Is s=r?
(1) s2=r2
(2) s is positive.

A.

【参考答案】

E
E 解析：Here's another question that is looking for a yes......

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听力原文：W: Hi, Don, would you like to go swimming this afternoon?M: I wish I could, but I have to spend the rest of the day in the library. I have a ten-page paper due tomorrow.W: Oh, is that for Prof. Lowell's class?M: Yes, I have to do an analysis of a poem we read in class.W: That's hard. How is it going so far?M: Not very well. And I also have to study a lot for math and history. I don't know how I'm going to do it all.W: You know, Don, I've been doing well in math, so I'd be happy to help you.M: Oh, that will be great, Jenny.W: If you like, we can start after I come back from swimming.M: OK. I'll see you in front of the library. W: Gook luck with the poem.(20)A．He must speak with Professor Lowell.B．He has to take a math test.C．He's going to a conference.D．He has to finish a paper.

A.
W:
B.
W:
C.
W:
D.
M:
E.
W:
F.
M:
G.
(20)
A．He
H.
B．He
I.
C．He's
J.
D．He
K.

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卓越源于要求管理的（），真正的人才喜欢绩效的合理管理。

A.科学性
B.公平性
C.合理性
D.优越性

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