质量为2m，半径为R的偏心圆板可绕通过中心O的轴转动，偏心距OC＝R/2。在OC连线
题型：单项选择题
问题：
质量为2m，半径为R的偏心圆板可绕通过中心O的轴转动，偏心距OC＝R/2。在OC连线上的A点固结一质量为m的质点，OA＝R如图示。当板以角速度w绕轴O转动时，系统动量K的大小为（）。（注：C为圆板的质心）。
A.K＝0
B.K＝mRw
C.K＝3/2mRw
D.K＝2mRw
题型：单项选择题
Whitney Houston was 小题1: b on August 9, 1963. She is an famous American singer, actress and model. She is the most awarded woman artist of all time, according to Guinness(吉尼斯) World Records and she had won 415 awards by the year 2010.
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Houston passed 小题4:a on February 11, 2012. People all over the world mourned the 小题5:l of her by collecting her albums and videos. Later last year her film “Sparkle”was shown in cinemas.