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基于端口划分VLAN是一种常见的VLAN划分技术。 A、正确 B、错误

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A、正确
B、错误

The writer uses the examples of the death of the stray ...

单项选择题The writer uses the examples of the death of the stray cat to discuss _____________. A.
the eternal theme of love, death and life B.
the tragic life of animals C.
the tragic life of human beings D.
the sorrows of the world

One reason students cheat in exams is that they have to...

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A、put up with  
B、make up for  
C、keep up with
D、catch up with