Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion？
A. hydraulic pumps
B. valves
C. hydraulic cylinders
D. hydraulic motors
查看答案
进行内部因素分析时，常用的内部指标不含()。
A. 风险性
B. 安全性
C. 营利性
D. 流动性
A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.
A. can be reset to energize the circuit
B. should open the circuit when overloaded
C. will burn out when an over current flow develops
D. should short the circuit when overloaded
What type of valve is used to direct the flow of hydraulic fluid？
A. relief valve
B. direction control valve
C. stop valve
D. pressure control valve
微信支付 
支付宝支付