【单选题】光滑接触面约束只能限制物体沿接触面的内法线方向运动,而不能限制物体沿接触面的外法线方向和切线方向运动,此说法()
【简答题】连词成句。 1. Are, thirsty, you (?) _________________________________ 2. I, thirsty, am, not (.) _________________________________
【简答题】光滑接触面约束只能阻止物体沿接触点(或接触面) 方向的运动而不能限制物体沿接触面 ______ _方向的运动。
【单选题】A Thirsty World The world is not only hungry, it is also thirsty for water. This may seem strange to you, since nearly 75% of the earth's surface is covered with water. But about 97% of this huge amou...
【简答题】选择正确的选项。 1. 妈妈问你口渴吗,她会说: [ ] A. Who are thirsty? B. Who is thirsty? C. Are you thirsty? 2. 当你想问别人想吃些什么时,你会说: [ ] A. What would you like to eat? B. What you like to eat? C. Would you like some ...
【多选题】光滑面约束只限制沿物体接触面( )的运动。不正确的选项是( )。
【单选题】A Thirsty World The world is not only hungry, it is also thirsty for water. This may seem strange to you, since nearly 75% of tile earth's surface is covered with water. But about 97% of this huge amo...
【判断题】光滑面约束不能限制物体沿接触面切线方向的运动,只能限制物体沿接触面的公法线方向的运动。