电机车的制动闸瓦厚度不得小于()。
A.5mm
B.8mm
C.10mm
参考答案:C
The old woman _____ her sons and daughters _______ and see her soon.
A.suggested; to come
B.hoped; to come
C.urged; coming
D.urged; to come
下列组合,错误的是
A.体轴——人体水平方向
B.水平面——人体直立时与地面平行
C.正中线——上下方向走行
D.矢状面——与水平而平行
E.冠状面——与矢状面垂直