问题
填空题
摇身一变。增加、减少或改变一个字母，使之变成新词。
1. right ____________________
2. ball ____________________
3. fat ____________________
4. that ____________________
5. bad ____________________
6. plane ____________________
7. river ____________________
8. read ____________________
9. chair ____________________
答案
1. light / eight 2. tall / wall 3. fan / at 4. what 5. bed / bag 6. plate / plan 7. driver 8. bread / red 9. hair
答案不唯一
浓度在一定范围内增高对呼吸有何影响？并阐述变化机制。