【单选题】国际电信联盟认为,媒介有以下五种:感觉媒介、表述媒介、表现媒介、存储媒介与传输媒介,其中()媒介包括声音、文字、图形、图像等以及物质的质地、形状、温度等。
【单选题】If an electric motor fails to start, you should FIRST check the ______.
C.
fuse or circuit breaker
【简答题】沟通媒介有四类:印刷媒介、视听媒介、______、______。
【单选题】If the electric motor driving an air compressor fails to start, the cause may be a _____.
B.
tripped circuit breaker
【单选题】If an electric motor driven air compressor fails to start, it may be due to a _____.
A.
leaking discharge valve
C.
tripped overload relay
D.
broken discharge un-loader
【单选题】下列不属于液压泵打不出油或油量少的原因是( )
【简答题】翻译以下段落: The rotor (rotating member) in an electric motor has rotational inertia, and a torque is required to bring it up to speed when the motor is started. If the motor shaft is rigidly connected to ...
【单选题】If an electric motor fails to start, you should first check the_____.
C.
fuse or circuit breaker