皮下的(尤指皮下注射)的缩写是
A．H．B．iv．C．Iv．gtt．D．p．o．E．im．
参考答案：A
He is practicing every day, preparation for the ice-skating championship. [ ]
A. in
B. on
C. during
D. about
comtech570调制解调器在VIPERSAT系统使用时，必须确认设备的working mode为（）。
A.ManageD Switch
B.Router-vipersAt
C.Router-smAll Network
D.Router-Point to Point
