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【单选题】
关于防骗的说法错误的是（）A.
将个人证件借给他人
B.
对陌生人切不可轻信，更不要将钱借给陌生人；防止以“求助”或利诱为名的诈骗行为
C.
不可轻信张贴广告或网上、电话中的信息，勤工助学、求职应聘等
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反馈参考答案：
举一反三
【简答题】在关系模式R(U，F)中，如果X→U，则X是R的() A侯选键 B超键 C主键 D外键
【单选题】—Have you thought of the topic for the composition? — Not yet．I _____ it very carefully, but I haven’t decided．
A.
will consider
B.
have been considering
C.
had considered
D.
was considering
【单选题】听力原文：M: Where have you been? I thought I was going to have to take the plane without you. W: I'm sorry, I thought we were going to meet in front of the check-in. Fortunately I thought of coming to the...
A.
On the railway platform.
B.
Near the departure gate.
C.
In front of the check-in.
D.
On board the plane.
【单选题】在关系模式R(U,F)中。如果X→Y,如果不存在X的真子集X1,使X1→Y成立,则函数依赖X→Y为
A.
部分函数依赖
B.
完全函数依赖
C.
传递函数依赖
D.
平凡函数依赖
【单选题】Aren’t you tired? I ____ you had done enough for today. A. should have thought B. must have thought C. might have thought D. could have though...
A.
should have thought
B.
must have thought
C.
might have thought
D.
could have thought
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