They are filling their bags ____ books and other things. [ ]
A. in
B. with
C. of
D. by
答案:B
斷路器操動機構裝設自由脫扣裝置可以()
A.使斷路器迅速跳开
B.使斷路器快速合闸
C.在故障情况下合闸过程中快速跳闸
晕厥的前驱症有
A.头晕
B.多语
C.胸闷
D.嗜睡
E.恶心