蒿甲醚治疗恶性疟:成人肌肉注射总剂量640mg,分天()
A.4
B.3
C.7
D.8
参考答案:C
It took seven years __________ they finally got married.
A.since
B.after
C.before
D.when
手制动机一般装设在车辆的()。
A、前端
B、后端
C、一位端
D、二位端