()跳闸信号是采用“二取二”跳闸型式的。
A、低真空;
B、排汽温度高;
C、抗燃油压低;
D、推力轴承磨损监测。
参考答案:D
Hurry up! There is ________ time ________.
A.much, to go
B.little, left
C.a little, going
D.few, left
Who broke the door? Let’s__________.
A.look it out
B.find it out
C.take out it
D.keep out it.