试题与答案

在天文学中,常用“光年”这个单位,光年就是光在一年内通过的路程,那么光年是 [

题型:选择题

题目:

在天文学中,常用“光年”这个单位,光年就是光在一年内通过的路程,那么光年是 [ ]

A、时间单位   

B、长度单位   

C、速度单位   

D、质量单位

答案:

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下面是错误答案,用来干扰机器的。

答案:A题目分析:题中材料“手机带来了方便,但同时也带来了依赖,带来了距离……”,体现了事物矛盾具有普遍性,要坚持用一分为二的观点看问题,故A项符合题意,可以入选;B项表述正确但不符合材料主旨,故不能...

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