题目内容

砂轮的硬度指标越高,磨粒越不易脱落,磨削效率越高。()

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向心推力轴承的接触角越大承受轴向载荷的能力就越大。()

清仓盘点的目的是确定仓库的存量和经济效益。()

计算机键盘是输出设备。()

Which of the following technologies was designed to provide the FASTEST data rates over analog phone lines?()

A. RADSL
B. SONET
C. ADSL
D. MPLS

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