1.2400/60=(2400*())/(60*8) 2..3200/A=(3200*4)/(A*())=(3200/())/(A/7)

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1.2400/60=(2400*())/(60*8)2..3200/A=(3200*4)/(A*())=(3200/())/(A/7)1.2400/60=(2400*())/(60*8)2..3200

1.2400/60=(2400*())/(60*8) 2..3200/A=(3200*4)/(A*())=(3200/())/(A/7)
1.2400/60=(2400*())/(60*8) 2..3200/A=(3200*4)/(A*())=(3200/())/(A/7)

1.2400/60=(2400*())/(60*8) 2..3200/A=(3200*4)/(A*())=(3200/())/(A/7)
2400/60=(2400*(8))/(60*8)
3200/A=(3200*4)/(A*(4))=(3200/(7))/(A/7)
不知道你想问什么诶?.