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【单选题】
如果分时操作系统的时间片一定,那么( ),则相应时间越长。A.
用户数越少
B.
用户数越多
C.
内存越小
D.
内存越大
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反馈参考答案：
举一反三
【单选题】You deployed new fibers in your network to replace copper spans that were too long. While reconnecting the network， you experienced network problems because you reconnected wrong fibers to wrong ports...
A.
Only use fiber in pairs.
B.
Configure root guard on your switches.
C.
Do not use fiber but use copper.
D.
Configure UDLD to prevent one-way link conditions.
【单选题】You are reconnecting a three-phase induction motor to the supply line. To prevent possible damage to the load, due to the wrong direction of rotation, you should ______.
A.
connect the motor and then use the 'jog' button to determine the direction of rotation
B.
connect the phase indicator to the motor leads, rotate the motor by hand and then connect to the supply voltage
C.
connect the phase indicator to the supply voltage then connect the motor
D.
check the supply line phase sequence and motor rotation with appropriate indicators, then connect correspondingly marked leads
【单选题】金刚石的晶体结构属于 点阵, 其致密度为 。
A.
体心立方 0.68
B.
体心立方 0.54
C.
面心立方 0.34
D.
面心立方 0.74
E.
体心立方 0.34
F.
面心立方 0.52
【单选题】There seem few movies by Hitchcock ______ she wants to see, for she has seen almost all of his movies.
A.
that
B.
which
C.
who
D.
whom
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