我们生活的世界是由形形色色的物质组成的，你知道化学是怎么将它_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题问答题

我们生活的世界是由形形色色的物质组成的，你知道化学是怎么将它们分类的吗？

请你按照下面表格的要求，试一试填上你所熟悉的物质（每个空格中只填一种物质，填名称或化学式均可）．

我知道

我见过

酸

碱

盐

氧化物

答案

电离时生成的阳离子全部是H⁺的化合物叫酸，如硫酸等；电离时生成的阴离子全部是OH^-的化合物叫碱，如氢氧化钠等；由金属离子和酸根离子组成的化合物叫盐，如氯化钠等；有两种元素组成的，其中一种元素是氧元素的化合物叫氧化物，如二氧化碳、水等．

故答案为：

酸	碱	盐	氧化物
H₂SO₄	NaOH	NaCl	CO₂

补全对话，情景问答

给下列的问句选择合适的答语。

( ) 1. Where are you going?
( ) 2. Are you going to the silk shop?
( ) 3. When are you going?
( ) 4. What are you going to do tonight?
( ) 5. What is it?

A. Watch TV.
B. It's a post card.
C. To the supermarket.
D. At 8: 00.
E. Yes.

补全对话，情景问答

情景对话。从所给的选项中选择最佳项完成对话。

A. Are you feeling better?
B. Where shall we meet?
C. What are you doing?
D. I'm feeling better.
E. Would you like to go with me?
F. When shall we meet?

John: Hello, Jim. This is John.    1
Jim: I'm staying in bed. I had a bad cold.
John: I'm sorry to hear that.    2
Jim: Yes. My mother took me to the hospital. What's the matter?
John: I got two tickets to Titanic this evening.    3
Jim: Yes, I'd like to.
John:    4
Jim: Let's meet at half past six.
John:    5
Jim: Let's meet at the school gate.
John: OK. See you then.
Jim: See you.