已知二次函数f（x）=ax²+bx-3（a≠0）满足f（2）=f（4），则f（6）=______．

单词拼写

1. The car is running at a________(速度) of eighty kilometers an hour.

2. The teacher is glad that everyone in her class is________(渴望的) to learn.

3. Jeff has the________(习惯) of listening to music while reading.

4. Mr White has been________(缺席的) from work for days, so he knows nothing about our new plan.

5. He tried to________(解释), but she wouldn't listen.

6. The local government is________(讨论) how to help the poor in the countryside.

7. When things aren’t going well, my parents always________(鼓励) me, telling me not to give up.

8. Miss Harper closed her eyes and________(假装) to be asleep.

9. We sat chatting for a few________(分钟) after finishing our meal.

10. I have been________(深深地) impressed by a number of experiences in her life.