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【简答题】
Given the two relations X and Y below X: A B Y: C D 2 s t 1 5 z r 3 w 2 what values would be in the tuple produced by the following statement? Result ¬ JOIN X and Y where X.A < Y.D
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【简答题】在Centos7中,一般采用__命令来查看网络接口的状态。
【简答题】锅炉辅助设备有______、______、______、______、______、______、______、______、______及一些锅炉附件。
【单选题】听力原文：M: I have been studying too much and need a change. So I have just made plans to go away during January break. W: Really? Where are you going? M: I'm planning to visit New Mexico. W: My sister an...
A.
To improve his skating techniques.
B.
To climb mountains.
C.
To take a vacation.
D.
To learn to ski.
【简答题】锅炉辅助设备主要包括（ ）等。
【单选题】Tony: I hope to go to a game soon. I have just been so busy (5)____________.
A.
now
B.
today
C.
lately
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