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【单选题】
在Zm中规定如果a与c等价类相等，b与d等价类相等，则可以推出什么相等?
A.
a+c与d+d等价类相等
B.
a+d与c-b等价类相等
C.
a+b与c+d等价类相等
D.
a*b与c*d等价类相等
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A.
the exporter's
B.
the importer's
C.
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D.
the government's
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B.
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【单选题】So far as___interest is concerned, D/P at sight is more favorable than D/P after sight, and D/P is more favorable than D/A.
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the exporter's
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【单选题】____ permission allows authorized people to open a file and view it, but they cannot modify it or delete it.
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查看完整题目与答案
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A.
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exchange
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【简答题】Database (1) allows the user to organize the (2) in the manner required for the (3) , a llow s retrieval of that data , and also allows the (4) to easily add , delete or (5) data in the database . The...
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【单选题】删除字符串前导和尾部空格的函数是()
A.
Ltrim
B.
Rtrim
C.
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查看完整题目与答案