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