【判断题】 中线在延长前,必须对上一组中线进行检查。
【单选题】What does the woman mean?
A.
She wants to meet him on Friday.
B.
She wants to meet him tomorrow night.
C.
She will be busy every day this week.
【判断题】力对物体的作用效应分为外效应和内效应,理论力学中主要研究的是外效应。
【简答题】力对物体的作用效应一般分为外效应和内效应,平衡力系对刚体的作用效应是什么?
【简答题】A Mike: My father goes to work at eight o'clock every morning. Amy: What does he do? Mike: He's a policeman. Amy: My father goes to work at six o'clock every evening. Mike: That’s late. What does he d...
【简答题】力对物体的作用效应一般分为外效应和内效应,平衡力系对刚体的作用效应为 _______ 。
【简答题】力对物体的作用效应一般分为外效应和内效应,力对刚体的作用效应只剩下( )。
【判断题】力是物体间的相互作用,它的作用效应可分为外效应和内效应。
【简答题】力的效应分为( )作用效应和( )作用效应。外作用效应使物体的( )发生改变,内作用效应使物体的( )发生改变。