CD-ROM是顺序存取设备。(  )

CD-ROM是顺序存取设备。(  )

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甲计算机的主频快,乙计算机的主频慢,甲计算机的运算速度也必定比乙计算机的运算速度快。(  )

甲计算机的主频快,乙计算机的主频慢,甲计算机的运算速度也必定比乙计算机的运算速度快。(  )

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Many engineering professors may not have time to prepare mat

Many engineering professors may not have time to prepare material for class disc

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Rescue vehicles had a hard time getting to people.

Rescue vehicles had a hard time getting to people.

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Emily Greene Balch's steadfast labor for freedom and for coo

Emily Greene Balch's steadfast labor for freedom and for cooperation among indiv

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