一定质量的理想气体自状态A经状态C变化到状态B，这一过程在V—T图上表示如下图所示。则：（    ）

读短文，判断对错。
    My name's Alice. Look at my classroom. It's big and clean. The floor is green, the walls are white. The door is yellow and the windows are blue. Two pictures are on the wall. They are beautiful. How many lights are there? Nine! My desk is near the door. My schoolbag is on the desk. What's in my schoolbag? A pencil box, an English book, a maths book, a Chinese book, three storybooks and five notebooks. I like my classroom. I like my schoolbag too.

完成连线

儒家____        无为而治

法家____        兼爱非攻

道家____        知己知彼，百战不殆

墨家____        用“刑罚”统治

兵家____        以礼治国

用所给单词的适当形式填空。

化学就是研究物质及其变化．在日常生活中，属于化学学习中常见的物质的是（　　）