治疗阴虚咳嗽的首选方剂是()
A.荆防败毒散
B.沙参麦冬汤
C.清金化痰汤
D.桑菊饮
E.百合固金汤
参考答案：B
Don't shout at him. He _______. [ ]
A. will do his best
B. did well in
C. is good at
D. did his best
木块沿斜面匀速下滑，对木块受力分析，正确的是（ ）
A．木块受重力和斜面对它的支持力
B．木块受重力、斜面对它的支持力和摩擦力
C．木块受重力、斜面对它的支持力、摩擦力和下滑力
D．木块受重力、斜面对它的支持力、摩擦力、下滑力和压力
