1980年著名作曲家施光南深入安徽、四川农村体验生活，满怀激情地谱写经典歌曲《在希望的田野上》。他选择赴上述农村体验生活的最主要理由是（    ）

我国以____ 一线划分为南北方地区，主要粮食作物，北方为____、南方为____ ．

- Thank you very much!

- _________.

质量相等的甲、乙两同学站在滑板上，在旱冰场上相对而立，如果甲用60N的力推乙，如图所示。以下分析正确的是（  ）

（____）Well, don't be late for class. This is very important.

（____）Ok, so we must be on time. Can we bring music players to school?

（____）I see.

（____）Hi, my name's John

（____）Really? What are some of rules?

（____）No , we can't. And we always have to wear the school uniform(校服）.

（____）Oh , and we also have to be quite in the library.

（____）Hi, John. I'm Alice.

（____）This is a good school, but there are some rules.

（____）It's my first day at school