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问题 选择题

推理是学习化学的一种重要方法，但不合理的推理会得出错误的结论。以下推理正确的是[ ]

A．含碳元素的物质充分燃烧会生成CO2，燃烧能生成CO2的物质一定含碳元素

B．离子是带电荷的微粒，带电荷的微粒一定是离子

C．碱溶液的pH都大于7，pH大于7的溶液一定是碱溶液

D．分子可以构成物质，物质一定是由分子构成的

答案

答案：A

阅读理解
根据短文内容，从下面方框选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
     The world is an interesting place. Different people like different things. Some people like loud music.
Other people don't 1. ______.
     Many people like sports, but they do not all like the same sports. In some countries, cricket (板球运动)
is a very popular sport. In others it is not popular at all. No one plays it or watches it on TV. However,
most people like soccer. The World Cup is very popular 2. ______.
      Different people like different foods. Some people do not like meat 3. ______. Some people do not
like potatoes or bread. They prefer rice.
      4. ______ Most people have their favorite colors. Some people like bright colors. Others prefer pale
colors.   
     Many people like travelling. Different people like different places. Some people like to go to the country.
They like the fresh air. Some people like to go to the cities. Because they like shopping 5. ______.
     What do you like? Have you got an idea?
A. They like soft music.
B. Not everyone likes the same color.
C. Millions of people watch the games on TV.
D. Different people like different kinds of pets.
E. They eat fruit and vegetables most of the time.
F. So they don't raise pigs in their countries.
G. Some other people enjoy beautiful places like the mountains or beaches.
1._____ 2._____ 3._____ 4._____ 5._____
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填空题

下图是固物质体甲的溶解度曲线。

（1）图中A点代表甲的___________溶液（选填“饱和”或“不饱和”）。

（2）请填写下表剩余的空格（在表中的第1、2、3栏内选填“变大”、“变小”或“不变”）。

 1234
降低温度溶剂质量溶质质量溶质质量分数溶液状态
A→B  不变B点
B→C不变  C点
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