单项选择题Following such protocol (the ordinary design flow), the design cycle is too long and exhausted to meet the demands of the market.A.对B.错
多项选择题2.在三角式练习中，如何保持肩背在同一平面上？ A、髋关节放正 B、肩背后移 C、髋关节旋前 D、屈腿
