题目内容

中国精神主要包括民族精神和时代精神两个方面。()

A. 对
B. 错

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Which dimension decides output torque of a hydraulic piston motor?

A. motor diameter
B. piston length
C. piston diameter
D. all of the above

High speed hydraulic motors usually provide low torque.

A. 对
B. 错

______is the device that provides amplification(the increase in current, voltage, or power of a signal)without appreciably altering the original signal.

A. analog
B. digital circuit
C. amplifier
D. power supplier

In the common-emitter circuit, the base terminal of the transistor serves as the input, the collector is the output, and the______is common to both.

A. base
B. emitter
C. substance
D. collector

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