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解设：甲有X人,乙有Y人
X+Y=101
4（1/3X+1/2Y）=345
解得：X=61.Y=50
答：甲班有61人,乙班有50人.
其他类似问题
问题1：初一下期中考试首字母填空How to save yourself in an Earthquake(地震）An earthquake may come at any time.Do you know w___ to do in an earthquake?Let me tell you.When an earthquake begins and if your are o_____.you must get into the open [英语科目]
An earthquake may come at any time. Do you know what to do in an earthquake? Let me tell you. When an earthquake begins and if your are outside. you must get into the open air and stay away from buildings. If you are inside,you must stand in a corner or hide under a heavy desk or table. When you are driving a car, you must drive to the side of the road and stop. After the earthquake,you must try to talk with everone in your family to see if they are safe and see if water and electrical lines(电线） are OK. Please don't smoke or turn on the lights because the electrical lines may be broken.You must keep the telephone line open too.Don't forget to put a book over your head to protect(保护） it.
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