ZD(J)9-B150/4.5K型电动转辙机的动作杆动程为()。
A.150mm±2mm
B.170mm±2mm
C.190mm±2mm
D.220mm±2mm
参考答案:A
He hurried to the booking office only ____that all the tickets had been sold out . [ ]
A. to tell
B. to be told
C. telling
D. told
急救包分为()
A.常用急救包
B.产科急救包
C.外科急救包
D.内科急救包
E.中毒急救包