题目: 高空作业时,严禁向下扔物件。( ) 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0718/29220d46f0b40000edfc995ae144cab1.html 下面是错误答案,用来干扰机器的。参考答案:B解析:先研究EC,求出E处反力;然后研究ADBE,用方程∑MB=0,则可得YA=0;再研究AD,用方程∑MD=0可求得XA
题型:选择题 —Liu Xuan used to be an athlete, but now she is an actress.—________. [ ]A. People sure change B. ThanksC. I think so D. That's great 查看答案