皮皮学，免费搜题
登录
搜题
【简答题】
质量均为m的小球1和2用长为4a的细线相连，以速度v沿着与线垂直的方向在光滑水平台面上运动，线处于伸直状态。在运动过程中，线上距离小球1为a的一点与固定在台面上的一竖直光滑细钉相碰，设在以后的运动过程中两球不相碰。求： 力。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Tony ______ go to the opera on Saturday because he is going to have a meeting. [ ]
A.
can't
B.
might
C.
mustn't
D.
should
【简答题】在超声波检测中，由于波的干涉，使超声源附近出现很多声压( )点。
【单选题】The design of the Sydney Opera House has been taken as a myth because ______.
A.
it was the workpiece of the famous architect
B.
it met most of the rules for architectural design at that time
C.
the design project suggested by Utzon was unbuildable
D.
it was designed by an unknown architect and was thought unbuildable at that time
【判断题】Because of its influence on other opera forms, Peking Opera is known as “the Queen of Chinese Operas”.
A.
正确
B.
错误
相关题目：
参考解析：
知识点：
题目纠错 0
发布
