医德义务是 A．为了搞好医患关系 B．以提高医疗质量为前提的 C．以谋求一种权利为前

下列哪项是慢性病的二级防治策略

A．制定控烟政策

B．康复训练

C．中老年妇女每年一次的妇科检查

D．中小学生体质测定

E．全民健身运动

桃树可自花结实，设施栽培时（）。

For many years, people （）electric cars. However, making them has been more difficult that predicted.

A. had dreamed of

B. have dreamed of

C. dreamed of

D. dream of

大黄的粉末镜检可见的特征有（）

A.淀粉粒

B.石细胞

C.草酸钙方晶

D.网纹或具缘纹孔导管

天然砂