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【单选题】
不能使用电火花线切割加工的材料为A.
石墨
B.
铝
C.
硬质合金
D.
大理石
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举一反三
【简答题】一个关系就是一张二维表,二维表中垂直方向的列称为()。
【简答题】A.Because they don’t think foxes are harmful． B.Because they think fox hunting is cruel． C.Because they think fox hunting is expensive． D.Because they think the number of foxes has dropped a lot．
【单选题】Mary couldn’t help but _____ in despair, staring at the fox which had blood-red eyes and seemed _____ her.
A.
feeling; to be watching
B.
feel; watching
C.
feel; to be watching
D.
to feel; to have watched
【简答题】阅读短文，判断下列句子正(T)误(F)。 A Fox and a Lion This morning, a fox meets a lion in the forest. Fox: Good moming, Mr. Lion. Lion: Good morning, Fox. What date is it today? Is it the 3rd of July? Fox: Yes. It's ...
【简答题】.二维表中垂直方向的列称为_ (5 ) _,水平方向的行称为_(6 ) 。
【简答题】二维表中垂直方向的列称为( )
【单选题】The student sat there, __________ what to do. [ ]
A.
doesn't knowing
B.
didn't knowing
C.
not know
D.
not knowing
【简答题】一个关系就是一张一维表,二维表中垂直方向的列称为___。
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