请问nn们: og12 problem solving 138题 的问法很纠结,怎么理解?what the fraction of all the boxes loaded by the two crews did the day crew load? 还有98题中间3行怎么翻译 啊?a reading of n+1 corresponds to an intensty that is 10 times the intensity correspingding to a reading of n 多谢~~