根据下列提示列举相应的内容。

①我国现存的最早的数学名著---____ 

②世界上最早的天文著作---____ 

③确定我国后世农历基本框架的历法是—____ 

④我国现存的最早的一部百科全书式的农学著作---____ 

荀子说“君子知而能容愚，博而能容浅，粹而能容杂。”这句话表达的意思是（   ）

建立宏观和微观之间的联系是化学学科特有的思维方式．下列对宏观事实的微观解释错误的是（    ）

What are the children doing?

    What are you doing,children ?Oh, we are playing games,Look at LiLei,He is throwing the frisby with Jim .What about the twins? They are flying kites.The kites are very nice.One looks like a bird,the other is like a plane, LiTao is Playing basketball with me. HanMei and MaLin are singing an English song under a big tree.