问题
不定项选择题
pH＝2的A、B两种酸溶液各1 mL，分别加水稀释到1000 mL，其溶液的pH与溶液体积(V)的关系如图所示，则下列说法正确的是
A．A、B两种酸溶液物质的量浓度一定相等
B．稀释后A酸溶液的酸性比B酸溶液强
C．a＝5时，A是强酸，B是弱酸
D．若A、B都是弱酸，则5>a>2
答案
CD
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pH＝2的A、B两种酸溶液各1 mL，分别加水稀释到1000 mL，其溶液的pH与溶液体积(V)的关系如图所示，则下列说法正确的是
A．A、B两种酸溶液物质的量浓度一定相等
B．稀释后A酸溶液的酸性比B酸溶液强
C．a＝5时，A是强酸，B是弱酸
D．若A、B都是弱酸，则5>a>2
CD
| 从方框中所给的选项中选择正确句子补全以下对话。（填序号即可） | |
B: OH, I've been to many places, such as Xi'an, Hangzhou, Shanghai, Guilin and Tibet. A: 2__________ B: Really? What places have you been to? A: Very few. I've only been to Pingyao. B: 3__________ A: It's in Shanxi. It's a small place, but it has a long history. It's one of the oldest towns in China. There you can see a well-kept city wall. B: 4__________ I've just seen a lot of natural beauties, but not much ancient Chinese culture (文化) yet. A: 5 |