有些化学计算题常常掺有一些解题中用不到的多余数据,又有一些题看上去似乎缺少数据。对这些题剔除多余的数据,寻找缺少的数据,是解题成败的关键。下面举例说明。一、题中含有多余数据为了检查同学们对基础知识的理解和判断能力,有时拟题时虚设一些与运算无关的数据,解题时应准 Some chemical calculation questions often contain extra data that are not used in the problem solving, and some questions seem to lack data. Excluding redundant data from these questions and looking for missing data is the key to success or failure. The following is an example. One, the question contains extra data In order to check the students’ understanding of the basic knowledge and ability to judge, sometimes when the problem is hypothesized, some data that are not related to the operation are used.