题目

Instead of blaming the child who had broken the vase, she gave him asmile and let him go. A . cautious B . grateful C . tolerant D . wild 答案：C对下列现象的解释或者结论错误的是A．“花香四溢”——分子在不断运动 B．过氧化氢分解——在化学变化中分子可以再分C．铁制品表面刷漆——可防止生锈 D．伸入集气瓶中燃着的木条熄灭——瓶中气体一定是CO2