问题 选择题
如图所示,大轮的半径是小轮的2倍,它们之间靠摩擦传动,接触面不打滑. A、B两点分别位于大、小轮的边缘上,C点位于大轮半径的中点,下列关于这三点的线速度v、角速度ω的说法中,正确的是(  )

A.vA:vB=2:1

B.vA:vC=2:1

C.ωA:ωB=2:1

D.ωA:ωC=2:1

答案

答案:B

判断题
填空题

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Several resort hotels even have adjoining golf courses and (6) parks with special privileges accorded to hotel guests. Family outings (7) these hotels can be a practical yet fun-filled activity. Guests (8) on longer stays may appreciate the serviced apartments situated within (9) major cities.
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