哪些情况下高厂变会发“通风故障”信号?
参考答案:
①运行中的某一组风机热偶动作。
②运行中的某一组风机电源进线开关跳闸。
Jessie was sick _____ such noise.
A.of hearing
B.to hear
C.of being heard
D.heard
小车开关在何时才能打开后面柜门?