上颌骨骨折向下后方移位其影响因素不正确者为()
A.重力
B.翼内肌
C.翼外肌
D.外力的方向
E.外力的大小
参考答案:C
The house on the farm ____Mrs. Smith, not her husband. [ ]
A. comes into possession of
B. takes into possession of
C. is in the possession of
D. is in possession of
船舶电力推进系统的电源装置除了变压器和变频器以外,还应包括哪一部分?()
A.冷却装置
B.发电机
C.推进电机
D.现场总线