【单项选择题】
A hydraulic machine is one that uses （） to do work.
A、A.liquid
B、B.steam
C、C.gas
D、D.electricity
查看正确答案A、The hydraulic pumps B、Valves C、Hydraulic cylinders D、Hydraulic motors
搜题
更多“A hydraulic machine is one that uses （） to do work.”相关的问题
第5题
A、A. hydraulic hatch cover B、B. hydraulic release unit C、C. hydraulic oil jack D、D. automatic hatch cover
第6题
A、the temperature of the hydraulic fluid B、the flow rate of the hydraulic fluid C、the temperature of the cooling water D、all of the above
第7题
A、warm-up allows the hydraulic system to become charged with oil B、warm-up allows the relief valves to be properly tested C、hydraulic strainers operate only during the warm-up period D、hydraulic fluid must be at the proper viscosity
