I need help

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I need help

I need help
I need help
 

I need help
反应物浓度越大,则微观上单位体积内活化分子越多,单位体积内有效碰撞几率增大,宏观表现为化学反应速率越快.

help,I need help Help I need you help I need help i need you help I need help I need help I need help i need you help I need your help i need help I need help! I need to help! I need ur help 大触们,I need you help! I need more i() to help you I need some help?改为一般疑问句 I need her help=什么 16题,I need you help