十字交叉法是进行二组分混合物平均量与组分量计算的一种简便方法。凡是具有a1x+a2y=a(x+y)关系式的习题,均可用十字交叉法。虽然使用此法,使解题过程简便、快速。但如果掌握不当,容易弄巧成拙,出现很大的错误。学生在应用十字交叉法得出结果后往往连自己也常弄不懂结果是什么东西。下面通过例题介绍十字交叉法的原理及其注意事项。 The crossover method is a convenient way to calculate the average and composition of two-component mixtures. Any exercise that has the relationship a1x + a2y = a (x + y) can be done using the cross method. Although using this method, the process of solving problems is simple and fast. However, if mishandled, easy to self-defeating, there was a big mistake. Students often do not understand what the result is after applying the cross-test method. The following example describes the principle of crossover and its precautions.