下列说法不正确的是
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A．100℃时，纯水中c(H+)=1×10-6 mol·L-1，pH小于7，此时纯水显酸性
B．25℃时，pH=12的烧碱和氢氧化钡溶液，二者物质的量浓度之比为2:1
C．25℃时，pH=3的盐酸与pH=5的硫酸等体积混合，混合液pH等于4
D．25℃时，0.1 mol·L-1 CH3COOH溶液中，c(CH3COOH)>c(CH3COO-)
AC
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| Today computers are very popular all around the world. Look at the picture. The old people are learning how to 1 the computer carefully, too. Now thousands of young people like to 2 to their friends in computer terms (术语). 3 their grandparents can't 4 their grandchildren's hi-tech language(语言). So they start to learn somethig 5 computers. "I want to know what my 6 are talking about,"says Grandmother Wang. She is a student at a(n) 7 school. There are many computer schools 8 the big city. These old people learn Microsoft Word, Windows and the Internet surfing. But the teaching method (方法) is 9 . "I have to teach them 10 and again, "says a computer teacher. | ||||
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