单项选择题
A.Sheet4 B.Sheet1 C.Sheet2 D.Sheet3
A.Novel B.ATM C.TCP/IP D.X25
A.背影.doc B.背影.zip C.背影.htm D.背影.txt
A.1MB=1024GB B.1MB=1024KB C.1KB=1024GB D.1GB=1024KB
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