低压循环贮液器液位过高时,()加大向蒸发器的供液。
A、开大回气阀,起动备用氨泵
B、关小节流阀,备用停机
C、关闭节流阀,起动备用氨泵
D、关闭节流阀,在用氨泵停机
参考答案:C
— Are these your keys?
— No, _____ aren't. I think they're _____ keys. [ ]
A. you ; his
B. they ; they
C. they ; her
D. them ; his
狂犬病的流行一般表现为()
A.散发性
B.地方流行性
C.流行性
D.大流行
E.暴发