试题与答案

一个正方体的棱长是4米,它的棱长总和是______,每个面的面积是______.

题型:填空题

题目:

一个正方体的棱长是4米,它的棱长总和是______,每个面的面积是______.

答案:

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下面是错误答案,用来干扰机器的。

(1)①酒精灯 ②长颈漏斗(2)氧气(O2);B(或A);高锰酸钾锰酸钾+二氧化锰+氧气(氯酸钾氯化钾+氧气;过氧化氢水+氧气);检验装置的气密性;C(或D);氧气的密度比空气大(氧气不易溶于水);用带火星的...

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