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【简答题】
如图所示,一质量为 、半径为 的圆盘,可绕 轴在铅直面内转动。若盘自静止下落,略去轴承的摩擦,求: (1)盘到虚线所示的铅直位置时,质心C和A点的速率;(2)在虚线位置轴对圆盘的作用力。
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举一反三
【单选题】It can be concluded from the passage that Shakespeare's original text of The Merchant of Venice ______.
A.
is much more difficult to understand
B.
is always clear in language
C.
presents a negative viewpoint towards the Semitics
D.
is not as popular as his tragedies
【单选题】The passage implies that an original contribution in science is one that ______.
A.
is often quoted in the work of other scientists
B.
is careful not to make a value judgment about the use of data
C.
is applauded by all distinguished experimentalists
D.
generates a novel and well-founded generalization
【单选题】The matrix that is needed to compute equilibrium conditions when absorbing states are involved is called a(n)
A.
transition matrix
B.
fundamental matrix
C.
identity matrix
D.
equilibrium matrix
E.
absorbing matrix
【简答题】n1 is 157,n2 is 461,sum=n1+n2, Compute and output sum
【单选题】It is implied in the passage that ______.
A.
the original painting is still on display at the Louvre
B.
the original painting is now in the United States
C.
the original painting has been destroyed
D.
no one could possibly tell which is the original painting
【单选题】The passage implies that an original contribution in science is one that ______.
A.
is often quoted in the work of other scientists
B.
is careful not to make a value judgement about the use of data
C.
is applauded by all distinguished experimentalists
D.
generates a novel and well-founded generalization
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