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【简答题】
在题8—25图(a)所示机构中。圆盘和都是均质的，各自质量分别为m1与m2。半径均为R，绳的质量不计。斜面与水平面问夹角为θ，只计滑动摩擦不汁滚动摩擦。如在上作用一力偶矩M. 试求： (1)的角加速度； (2)轴承O的约束力。
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举一反三
【单选题】What is implied by 'the younger ones are surrounded by more children's language on average than the older kids' (Para. 3) ?
A.
Younger children need parental rather than siblings' attentioa
B.
Younger children need siblings' rather than parental attention.
C.
Younger children feel uncomfortable with more siblings.
D.
Younger children have less chance to talk with their parents.
【单选题】自络挡车工交接班要做到“一提前、三检查、一彻底”其中检查是指检查机械状态、检查工作地面、检查作业车等处是否有回丝、纱管、纱它等，另外要重点检查（）。
A.
纱筒质量问题
B.
准备工作
C.
车档卫生
D.
机台清洁工作
【单选题】What is implied by 'the younger ones are surrounded by more children's language on average than the older kids' (Para.3)?
A.
Younger children need parental rather than siblings' attention.
B.
Younger children need siblings' rather than parental attention.
C.
Younger children feel uncomfortable with more siblings.
D.
Younger children have less chance to talk with their parents.
【单选题】Play, often ______ as an activity for younger children, is still important in the social development of teenagers.
A.
to see
B.
seeing
C.
seen
D.
to be seen
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