alarm的意义是（）。

[单选题]The mode of control employed by an alarm circuit is aA．two position controlB．single speed floating controlC．proportional speed floating controlD．reset control

[单选题]The alarm signal for engine room catching fire is a blast of random bell followed by____.A．two knocksB．three BlocksC．four knocksD．five knocks

[单选题]A．n alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that .A．the expansion tank is lack of waterB．the expansion tank is over flowingC．there is something wrong with the cooling systemD．there is s

[单选题]A high temperature alarm or （） which will melt is used to guard against the explosion of compressor air pipelines.A . a flame trapB . a relief valveC . a fusible plugD . a bursting ca

[单选题]Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.A . temperatureB . pressureC . engine speedD . all of the above

[单选题]( ． )2． My alarm clock _________at six every morning．A．goes offB．goes onC．goes upD．goes to

[单选题]2． I see __________ alarm clock on the table．A．aB．anC．theD．/

[填空题] 站控画面Alarm一栏出现红色并闪烁，说明有新报警产生，如果Alarm一栏出现红色不闪烁，说明（）；如果Comms一栏出现浅蓝色，则表示有（）。

[填空题] 液压马达传动系统中，关闭主电机的信号是（）（ALARM）信号

[多选题] 对于SoftCo9500机箱告警指示灯（ALARM）的解释，以下哪个是正确的？（）A .灯闪烁（4Hz），表示系统运行时存在紧急告警，或者系统启动时软件加载异常B .告警指示灯（ALARM）颜色为红色C .灯灭，表示不存在告警D .灯闪烁（0.5Hz），表示存在主要告警