论文部分内容阅读
在解工程问题的时候,我们要学会用适当的假设,使工程问题比较容易地得到解决。如某项工程,甲单独做15天完成,乙单独做需20天完成。甲乙两人合做,由于甲中途有别的任务离开了几天,结果这项工程共花去了10天时间才完成。问甲离开了几天?若用平常的方法来解,应先求出甲实际做的天
In solving engineering problems, we must learn to use appropriate assumptions to make engineering problems easier to solve. Such as a project, A alone to do 15 days alone, B alone to be completed within 20 days. A and B co-do, because A midway left other tasks for a few days, the result of this project took a total of 10 days to complete. A few days left to ask? If the usual way to solve, you should first find the actual day of doing