混凝土受拉时的弹性模量与受压时相同。
参考答案:对
神经肌肉本体促进法(PNF)中:慢反向-维持()。
A.相互拮抗的肌肉的交替的等张收缩
B.接着作主动肌的等张收缩
C.拮抗肌与主动肌同时的等张收缩
D.增加运动模式中无力成分的活动范围与耐力
E.拮抗肌的等张收缩、松弛
—I don't know how to deal with these old books.
— _____ giving them to the children from poor families?[ ]
A. What about
B. Why don't you
C. Shall we
D. Why not