单项选择题
A.the bridge officer on watch B.the chief engineer C.the duty engineer D.the duty motorman
（） handle and instruments are on the front.A.openB.open...
单项选择题（） handle and instruments are on the front.
A.open B.open front type C.live front type D.None of the above
The （） is a crystal which, under pressure, produces an ...
单项选择题The （） is a crystal which, under pressure, produces an electric current which varies with the pressure.
A.alternator B.glass thermometer C.burdon tube D.piezoelectric pressure transducer
Remote control means that （）.A.the system is manned man...
单项选择题Remote control means that （）.
A.the system is manned manually B.the system is situated remotely from the operator C.the system is controlled automatically D.all the above
