题目

The three students are all excellent, but Tim is _____ of the three.A.creative B.more creative C.the most creative 答案:【答案】C【解析】句意:三个学生都很优秀,但蒂姆是三个学生中最有创造力的。考查形容词最高级。creative有创造性的,原级;more creative更有创造性的,比较级;the most creative最有创造性的,最高级。根据“The three students are all excellent”及“of the three”提示,可知此处用最高级。根据题意,故选C。2.用一动滑轮将货物400N的货物匀速提到高2m,所用拉力是250N,求有用功、额外功、总功和动滑轮的机械效率各是多少?
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