单项选择题
A.predetermined value
B.measured value
C.off-limit
D.sustained deviation
单项选择题 TWO STEP CONTROLER ACTION is mainly（）
单项选择题 In the event of failure of an auxiliary such as a lubricating pump, the standby pump is started and put on the line automatically“the line” in this sentence refers to（）
单项选择题 Which of the following is NOT the advantages of the remote control and automation of engine operations?（）