A:能够发生化学反应的碰撞是有效碰撞
B:反应物分子的每次碰撞都能发生化学反应
C:活化分子之间的碰撞一定是有效碰撞
D:增大反应物浓度时,活化分子百分数增大
①a<0,②b<0,③c<0,
其中正确的判断是( )
根据首字母提示完成下列短文。
A good class monitor gets on well w____ classmates and likes to h____ others. He often cleans the classroom and makes the classroom c____ just like h____. C____ him to be your monitor.