A. 渐开线的形状取决基圆大小,当基圆半径趋于无穷大时形状变为直线 B. 基圆愈小渐开线愈平直 C. 渐开线上各点的压力角相等,都是20
A. 炙甘草汤 B. 镇肝熄风汤 C. 一贯煎 D. 百合固金汤 E. 清瘟败毒饮
A. a lot of B. many C. much D. many more