所谓隐含条件就是隐蔽在题目中必须通过认真分析才能得出的条件,它往往容易被人们忽视,但它又很关键,是解题不可少的条件。因此,必须引起高度的重视。现举例如下:一、隐含在实验操作要点中例1:实验室用氢气还原氧化铜,当大部分固体变红时,停止加热,冷却后,称得残留固体的质量为 The so-called implied conditions are hidden in the subject must be carefully analyzed to be able to come to terms, it is often easily overlooked, but it is also crucial, is an essential condition for solving problems. Therefore, we must attach great importance. Now for example as follows: First, implied in the experimental operation in the case of Example 1: Laboratory hydrogen reduction of copper oxide, when most of the solid turns red, stop heating, after cooling, said the residual solid mass