根据问句，找出相应的答语。

Questions:

1. What's your favorite subject?

2. What's his favorite sports?

3. What's her favorite color?

4. Why do you like math?

5. Why does he like P.E.?

6. Why does she like red rose?

Answers:

a. Because it's fun and interesting.

b. Because it's warm and nice.

c. My favorite subject is English.

d. His favorite sports is basketball.

e. Her favorite color is red.

f. Because it's exciting and can make us healthy.

1. →_______ 2. →_______ 3. →_______

4. →_______ 5. →_______ 6. →_______

天然气燃烧反应的机理是什么？