受力钢筋
参考答案:
是指构件在外部荷载作用下,通过结构计算得出的构件在正常工作状态时需配置的钢筋。
— Please _____ the tigers. It's dangerous to take photos with them.
— Oh, I see. Thank you. [ ]
A. keep off
B. take off
C. get off
D. turn off
胎儿发育后期易发生
A.生长迟缓B.受精卵死亡C.致畸作用D.母体毒性E.母体死亡