A.50% B.55% C.60% D.65% E.70%
A.20% B.35% C.50% D.60% E.65%
坐姿下列哪項(xiàng)不妥()
A.單手或雙手向后把衣裙下端捋平 B.輕輕落坐在椅面的1/2~2/3 C.兩腿并攏 D.小腿略后收或小交叉 E.兩手輕握,置于腹部或腿上