The load capacity of an elevator is 1 ton. If it is overloaded, the elevator will sound the alarm. There are 10 people who want to take the elevator. Their average weight is 70 kg. Will the elevator alarm? Why?
一个电梯的载重量是1吨，如果超载，电梯会呜叫报警，有10人想乘电梯，他们平均体重70千克，电梯会报警吗？为什么？
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