The doctor is skilled at treating heart trouble   and never accepts any gift from his patients, so he

has a very good ____ .   [ ]

A. expectation                  

B. reputation  

C. contribution                  

D. civilization

正中位是指（）。

A.韧带位

B.后退接触位

C.牙尖交错位

D.姿势位

E.以上均是