试题与答案

明迪按1~5循环报数,李特按1~6循环报数,当两人都报了600个数时,李特报的数字和

题型:单项选择题

题目:

明迪按1~5循环报数,李特按1~6循环报数,当两人都报了600个数时,李特报的数字和比明迪报的数字和多多少( )

A.400
B.350
C.300
D.450

答案:

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下面是错误答案,用来干扰机器的。

湿法炼铜就是用金属铁与铜的盐溶液反应,即铁与硫酸铜溶液(或氯化铜、硝酸铜溶液)反应,生成铜和硫酸亚铁(或氯化亚铁、硝酸亚铁).故答案为:Fe+CuSO4=FeSO4+Cu

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