题目

下列说法正确的是( ) A . 紫色的石蕊试液可使盐酸变红 B . 中和反应一定生成盐和水 C . 生成盐和水的反应一定是中和反应 D . 测定溶液的pH时，应先将pH试纸用蒸馏水润湿一下 答案：B根据要求改变下列句子（0.5分*10=5分）1.Nancy has more weeks off than Peter.（同义句）Peter has _________ weeks _________ than Nancy.2.This bridge is 200 metres wide, and that bridge is 350 metres wide.（同义句）This bridge isn’t ______ _______as that bridge.3.It took me more than two hours to paint my bedroom. (改为同义句)I __________ over two hours ________my bedroom.4.Andrew filled the room with water.(对划线部分提问)________ did Andrew fill the room __________?5.What is the meaning of this word? (改为同义句)What ________ this word ________?