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當一臺計算機發(fā)送E-mail信息給另外一臺計算機時，正確描述數(shù)據(jù)打包的5個轉(zhuǎn)換步驟是（）。
A.數(shù)據(jù)，數(shù)據(jù)段，數(shù)據(jù)包，數(shù)據(jù)幀，比特
B.比特，數(shù)據(jù)幀，數(shù)據(jù)包，數(shù)據(jù)段，數(shù)據(jù)
C.數(shù)據(jù)包，數(shù)據(jù)段，數(shù)據(jù)，比特，數(shù)據(jù)幀
D.數(shù)據(jù)段，數(shù)據(jù)包，數(shù)據(jù)幀，比特，數(shù)據(jù)
