已知函数f(x)=|lgx|.若0<a<b,且f(a)=f(b),则a+2b的取值范围是
用括号中所给词的适当形式填空
1. It takes about 15 minutes __ __ (walk) and 5 minutes by bus.
2. What do you think of the___ _ (transport) in your city?
3. How long did you spend________ (make) the model plane?
4. Thank you very much for__ _____ (invite) me to your birthday party.
5. It's about twenty___ _ (minute) walk to get there.
6. Don't_______ (worried) about your mother. I can take good care of her.
7. Don't speak so___ _ (quick).I can't follow you.
8. —How_______ (do) he go to school?
—He walks to school.
9. Don't speak___ _(China)in English classes.
10.Does Lei Lei need ___ _(hand) in her English homework now?
“人法地,地法天,天法道,道法自然。”老子这句话说明()
A.人和自然之间是相互联系的
B.人在自然面前是无能为力的
C.人类破坏自然会遭到自然的惩罚
D.人可以主宰自然