题目

下列有关说法错误的是（） A . 氯气可以用于自来水消毒的原因是：Cl2+H2O=HCl+HClO B . 久置的氯水最终变成稀盐酸 C . NaClO溶液的漂白原理与Na2O2相同，均体现了物质的强氧化性 D . 某无色溶液中加入AgNO3溶液产生白色沉淀，再加入稀盐酸，沉淀不消失，则该无色溶液中一定含有Cl- 答案：D 根据对话内容，从对话后的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。 A： Excuse me. 　1　 We've got a problem. B： Oh, yes? What's the matter? A： 　2 　We're cycling, and we haven't got anywhere to sleep tonight. B： I see. Have you tried the Crown Hotel? A： Yes, but it's much too expensive. 　3 　. B： Yes, all right. I don't mind. You don't smoke, do you? A： Oh, no. 　4 　well, thank you much. B： Not at all. Would you like to come into the house for a wash ? A： 　5　 B： This way. a． Could you do me a favour? b． Neither of us does. c． I'm sorry to trouble you. d． Oh, that's very kind of you. e．Well, you see, it's like this. f． So we wonder if we can sleep in your barn. g．Would you mind if we put up for the night at yours?