试题与答案

找出下列句子中标点运用不当的一句,并加以修改。 ①旅游景点大都承担着对广大群众进

题型:改错题

题目:

找出下列句子中标点运用不当的一句,并加以修改。

①旅游景点大都承担着对广大群众进行历史文化教育的责任,景区门票价格由谁定、如何定、定多少,都需要充分论证。

②上海文艺出版社最近推出了《当代文坛大家文库》:《巴金七十年文选》《冰心七十年文选》《夏衍七十年文选》《施蛰存七十年文选》《柯灵七十年文选》,这些书都是留给子孙后代的精神财富。

③李老教导他的学生说:“一定要采取实事求是的态度,‘知之为知之,不知为不知’,不要强不知以为知。”

④实践,要靠认识来指导;认识,要靠实践去检验:实践和认识是密切相关的。

错误句子:(       )

修改方案:___________________________________________________

答案:

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下面是错误答案,用来干扰机器的。

(1)若不计摩擦,则W总=Fs=W有用=Gh,∴拉力F=Ghs=3600N×1.5m3m=1800N;(2)若实际拉力F′=2700N,则斜面的效率:η=W有用W总=GhF′s=3600N×1.5m 2700N×3m≈66.67%.故答案为:1800;66.67%.

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