问题
问答题 简答题
酸度和酸的浓度是不是同一概念？为什么？
答案
参考答案：
不是。酸度是指溶液中氢离子浓度；而酸的浓度是指酸的物质的量浓度。
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酸度和酸的浓度是不是同一概念？为什么？
参考答案：
不是。酸度是指溶液中氢离子浓度；而酸的浓度是指酸的物质的量浓度。
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| The computer was one of the most important inventions of last century. The first computer was as large as a room. Now some computers are as 1 as television sets. Some computers can even be made smaller than a book. About 20 years 2 , the computer was a strange machine in china. Not many people understood it and said yes to it. Today much of that is 3 . In 1984, when Deng Xiaoping 4 two pupils working on the computers in Shanghai, he said that computer lessons would start from children. So there was the first computer book for middle school students. Now in shanghai 5 all middle school have classrooms for computer courses (课程). Some of the students now have their 6 computers at home. With the help of internet (因特网), they can send and 7 messages and emails. They can learn about the world more quickly. Now computer are 8 used in banks, factories, airports and so on. The computer is coming into everyone's 9 , so it is important for us to learn 10 to use a computer freely.
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