医学模式的核心是（）
A.预防观
B.医学观
C.社会观
D.生物观
E.健康观
参考答案：B
A new branch of the company is going to be open. ____, the decoration of its main store has been finished.
A．Instead
B．However
C．Therefore
D．Meanwhile
在日常生活中最常见的螺丝刀的头有“一字型”和什么字型？
