题目

-- What do you think of the two sweaters?    -- The yellow one looks good ________ the girl and the boy looks nice ________ blue. A. with, on     B. in, on      C. on, in       D. in , with 答案:C5、(1)在图中手提箱的A点施加200N竖直向上的力,请根据图中给出的标度,用力的图示法画出这个力.(2)如图所示,用力F踩汽车刹车踏板,请画出此力对支点D的力臂.(3)用如图所示的滑轮组成滑轮组提升木桶有两种绕绳方法,请任意画出一种.
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