如图所示,质量m的直角劈形木块ABC的顶角θ,被垂直作用在AB边的外力顶靠在光滑 发布时间:2017-06-28 21:45 │ 来源:www.tikuol.com 题型:问答题 问题: 如图所示,质量m的直角劈形木块ABC的顶角θ,被垂直作用在AB边的外力顶靠在光滑竖直墙上,当木块保持静止时.求外力F和竖直墙对木块的弹力大小各是多少.
题型:问答题 He was so sick that he _____ all that he had eaten. [ ]A. gave up B. brought up C. brought out D. took out 查看答案