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【单选题】
对于任何整数n，多项式（n+7） 2 -（n-3） 2 的值（ ）A.
被2n+4整除
B.
被n+2整除
C.
被20整除
D.
被10整除和被2n+4整除
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反馈参考答案：
举一反三
【单选题】Have you ever bought something just because the salesmen ______ it?
A.
talked you from
B.
talked you into
C.
talked you in
D.
talked to
【单选题】- What a new computer! Can you tell me ____? - Just the day before yesterday.
A.
when you bought it
B.
how much you paid for it
C.
when did you buy it
D.
how much did you pay for it
【单选题】以下哪个命令能获取系统的用户账号数量?
A.
account -l
B.
nl /etc/passwd |head
C.
wc --users /etc/passwd
D.
wc -l /etc/passwd
【单选题】—_____ big house you have just bought! —Thank you very much.
A.
What a
B.
What
C.
How a
D.
How
【单选题】以下哪个命令能获取系统的用户账号数?
A.
acount -l
B.
nl /etc/[passwd |head
C.
wc --users /etc/passwd
D.
wc --lines /etc/passwd
【单选题】听力原文：You just bought a computer, didn't you? (A) Yes, they delivered it yesterday. (B) I need a laptop. (C) No, it's not mine. (3)
A.
B.
C.
【单选题】---Have you bought ____________ for Linda’s birthday? ---- Not exactly. Just some flowers.
A.
something unusual
B.
anything unusual
C.
unusual something
D.
unusual anything
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