胃基本电节律的起搏点位于（）。
A.胃体大弯侧近端1/3和远端2/3连接处的纵行肌
B.胃底
C.胃窦
D.幽门管
E.贲门
参考答案：A
牙合支托长度应为磨牙牙合面近远中径的（）
A.1/2
B.1／3
C.1／4
D.2/3
E.3/4
— I phoned you at six last night, but _____ answered.
— I _____ a walk in the park at that time. [ ]
A. no one, was having
B. anyone, was having
C. nobody, had
D. somebody, had
