⑴    ____

⑵       ____

⑶     ____

⑷      ____

⑸     ____

A. — Look, this is our library!

— It is great.

B. — Look, this is my bedroom!

— Your bedroom is nice.

C. — What are they doing?

— They are playing on the playground.

D. — Is your home far from the school?

— No, it's near. I always walk to school.

E. — Where is your father?

— He is near the school.

图是地球饶日公转示意图，当地球从B运行到D时，下列描述正确的是（ ）

—I'm going to the Great Wall.

 回答下列问题：
（1）构成原子的粒子有____ 、____ 和____ ；整个原子不显电性的原因是____ 。
（2）构成物质的微观粒子有____ 、____ 和____等。例如：构成氧气的粒子是____ 、构成铁的粒子是____ 、构成氯化钠的粒子是____ 和____ 。
（3）下列物质：①氧气；②人体呼出的气体；③液氧；④空气中0.03%的稀有气体；⑤二氧化碳；⑥洁净的空气。其中属于纯净物的是____ ；请选出一种混合物并说明其中的成分____ 。