【单选题】描述弹性体内应变分量之间关系的方程是()。
【单选题】If an electric motor fails to start, you should FIRST check the ______.
C.
fuse or circuit breaker
【单选题】If the electric motor driving an air compressor fails to start, the cause may be a _____.
B.
tripped circuit breaker
【判断题】力学是描述和预测物体在力的作用下静止或者运动的条件的科学。
【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】描述弹性体内应力分量和体力分量之间关系的方程是()。
【单选题】If an electric motor fails to start, you should first check the_____.
C.
fuse or circuit breaker