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串联负反馈使输入电阻减小。()

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按GB7588—2003《电梯制造与安装安全规范》附录M进行曳引力计算时,需要计算当量摩擦系数f。f与摩擦系数μ成正比关系,μ恒等于0.1。()

The gardener is taking care of the place, no one _____ there at present.
A:living
B:lives
C:lived
D:to live

Quite often I've gone to a man who didn't tell me _____ Adam.
A:from
B:with
C:to
D:of

The next thing _____ happened was that something hit me terribly hard on the back of the head.
A:that
B:what
C:which
D:there

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