活化能
参考答案：
发生物理或化学反应时，形成中间络合物所需要的能量称为活化能。
将下列句子变为否定句。
1. I have lunch at school.
I ______ ______ lunch at school.
2. We watch TV in the evening.
We ______ ______ TV in the evening.
3. They play football after school.
They ______ ______ football after school.
4. Lucy and Lily like music.
Lucy and Lily ______ ______ music.
风险不能使大多数的保险对象同时遭受损失。这一条件表明损失的发生具有（）。
A.分散性
B.规律性
C.可测性
D.稳定性
