按有关规范要求,操舵装置控制系统的电源供应发生故障时,应在()发出能视听的警报。
A.舵机室
B.驾驶室
C.机舱
D.A+B+C均可
参考答案:B
The passenger was very impolite to the conductor, , of course, made things even
worse.
A.who
B.whom
C.which
D.what
()
A.A
B.B
C.C
D.D