A：Hi, Li Ming.____?

B：My favourite subject is English.

A：Do you have English on Monday?

B：____. And we have English on Wednesday too.

A：____?

B：We have English at 9:00 am on Monday.

A：Do you have maths on Monday?

B：____. We have it on Tuesday and Thursday.

A：____?

B：Yes, I like maths. But it's a bit difficult for me.

对病句的修改不正确的一项是（    ）

 对知识的比较与归纳是学习化学的重要方法，现有以下三个化学方程式：

①H₂CO₃ $\stackrel{△}{=}$H₂O+CO₂↑

②CaCO₃CaO+CO₂↑

③Cu₂（OH）₂CO₃$\stackrel{△}{=}$2CuO+H₂O+CO₂↑

通过比较发现：

（1）它们有许多相似之处，请写出其中的一条：____；

（2）它们也有许多不同，请指出其中一个与另外两个的不同之处：____ （答一条即可）．