龋病的修复性治疗时，下列哪项属于窝洞的基本固位形（）。
A.侧壁固位
B.倒凹固位
C.鸠尾固位
D.梯形固位
E.粘接固位
参考答案：A, B, C, D
On a ship，a fire pump may be used for other purposes if（）.
A.the other services are run off a reducing station with a pressure gage
B.a separate fire pump is available for use on the fire main
C.all other services are operated by a manifold near the pump
D.All of the above
全新君越所配备的全车速自适应巡航系统在车速超过多少时可以设定（）。
A.25km/h
B.35km/h
C.55km/h
D.60km/h
