There is a p____near our school. We can see many trees and flowers there. Some flowers are red, and some are y____. We can see a hill behind the park, too. At the foot of the hill we can see a r____. There are some boats on it. Children like to go there. It is Monday today. There are many young pioneers(少先队员)in the park. Some are walking and singing. S____are dancing and p____ games. Ann and h____ sister Kate are flying a k____. Tom and his brother Sam are t____a frisbee (飞盘). Their lather and mother are sitting u____ a tree. All the people are h____a good time.

隋唐实行三省六部制的目的是

利用右图装置，可以除去气体中的杂质：写出除去下列气体中的杂质所用试剂及方程式，（括号内的气体为杂质）．

（1）CO₂（HCl）  ____　，反应的离子方程式为　 ____　，不能用NaOH溶液的原因是　 ____　，也不能用Na₂CO₃的原因是　 ____（均用离子方程式表示原因）．

（2）NO（NO₂）　 ____，化学方程式　 ____．

填空题
(1)目前我国境内最早的人类是____ ；我国历史上建立的第一个国家是____ 。
(2)半坡居民最早种植____ ；河姆渡居民最早种植____ 。
(3)商朝的都城在今天的____ 省境内；西周的都城在今天的____ 省境内。
(4)公元前____ 年——前476年，是我国历史上的春秋时期；公元前475年前——____ 年，是我国历史上的战国时期。
(5)____ 辅助齐桓公取得了霸主地位；____ 修筑了著名水利工程都江堰。