如图所示,两个匀质圆盘质量分别为m1、m2,半径分别为R1、R2,各自可绕互相平行的固定水平轴无摩擦地转动,今对圆
如图所示,两个匀质圆盘质量分别为m1、m2,半径分别为R1、R2,各自可绕互相平行的固定水平轴无摩擦地转动,今对圆盘1相对其转轴施加外力矩M,圆盘、皮带都被带动,设圆盘、轻皮带间无相对滑动,求圆盘1、2的角加速度。
如图所示,两个匀质圆盘质量分别为m1、m2,半径分别为R1、R2,各自可绕互相平行的固定水平轴无摩擦地转动,今对圆盘1相对其转轴施加外力矩M,圆盘、皮带都被带动,设圆盘、轻皮带间无相对滑动,求圆盘1、2的角加速度。
第1题
A.which
B.that
C.whom
D.what
第2题
He talked a lot about things and persons_____they remembered in the school.
A.which
B.that
C.whom
D.what
第5题
The two friends talked about persons ______ they could remember at college.
A.who
B.what
C.that
D.which
第6题
The two friends talked about persons ______ they could remember at college.
A.who
B.what
C.that
D.which
第7题
What did they do when they were together?
A.They talked about a lot of things.
B.The speaker cooked for the old lady.
C.They did some gardening.
D.They talked about their families.
第8题
--Where is the man you talked about yesterday?--Look!______.
A.Here he comes
B.Here comes he
C.Here does he come
D.Here is he coming
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