单项选择题
The difference between measured and desired values is called （）.
A.make-up B.desired value C.deviation D.set value
单项选择题 With UMS, when the engine room is unwatched （） will control the main engine.
单项选择题 （） handle and instruments are on the front.
单项选择题 The （） is a crystal which, under pressure, produces an electric current which varies with the pressure.
