提高医疗质量的精神力量是（）。
A.治疗技术
B.医疗设备
C.规章制度
D.医德医风
E.经济效益
参考答案：D
He lost his job three years ago; _____, he was seriously injured in an accident last week.
A．in the first place
B．worse still
C．on the contrary
D．in other words
牛的前胃包括（）
A.瘤胃
B.网胃
C.瓣胃
D.皱胃
