在一定温度下的定容密闭容器中，取一定量的 A．B于反应容器中，当下列物理量不再改变
题型：选择题
问题：
在一定温度下的定容密闭容器中，取一定量的A．B于反应容器中，当下列物理量不再改变时，表明反应A(s)+2B(g) 
C(g)+D(g)已达平衡状态的是（ ）
A．混合气体的压强 B．混合气体的密度
C．D的物质的量的比值 D．气体的总物质的量
题型：选择题
单词拼写
根据下列句子及所给汉语注释, 写出空缺处各单词的正确形式.
1. Lisa, I didn't ______(认出)you-you've 
had your hair cut!
2. I usually just ha
ve a _______(三明治)for lunch.
3. Mr.White 
announced that he would go to China on _____(星
期三).
4. The story was first written in English and later ______(翻译)into Chinese.
5.The village children like to go ______(游泳)in the nearby river.
6. One of our _________(邻居)kept a very beautiful garden.
7. Rice is grow in China, Japan and other (亚洲)countries.
8. David turned and walked off in the ______(相反)direction.
9. Rose rushed _______(向楼下)to answer the door.
10. Few students in my class can (付得起) a trip to Zealand.