问题
名词解释
机构具有确定运动的条件
答案
参考答案：
当机构给定主动件运动规律的数目等于自由度数时，即机构具有确定运动。
搜题请搜索小程序“爱下问搜题”
机构具有确定运动的条件
参考答案：
当机构给定主动件运动规律的数目等于自由度数时，即机构具有确定运动。
阅读短文, 根据短文内容从下面方框内的七个选项中，选择五个还原到原文中，使短文意思通顺、结构完整。（每小题2分） Americans think much about time. 小题1: As children，they are taught to be on time to go to school, to work and to do everything. 小题2: When a person is dying, they say he is living on a borrowed time. Time is money. Time is knowledge. 小题3: A working American has to work hard for eight hours a day or forty hours a week. This is the working time. In his free time, he also works hard for more money. 小题4: In the street you can hardly see a man walking slowly. They walk very fast. In fact, they are running. 小题5: But sometimes they also hate time, because they become servant (佣人) of the clock.
|