题目

A、B、C、D是初中化学常见的物质，在一定条件下四种物质存在如下图所示的转化关系：A+B→C+D．（1）若A是硫酸，B是氢氧化钠，该反应的基本类型是 反应．（2）若A、C均是含同种元素的非金属氧化物，且A有毒性，D能被磁铁吸引．①C的化学式是 ，其固体俗称；②D的合金可用于制作炊具，主要是利用它的性．（3）若A、C是都是金属单质，B、D都是盐，请写出一个符合要求的化学方程式： ，该反应说明金属活动性：A（选填“＜”或“＞”）C． 完形填空。      Hello, everyone! I have something to   1   you . After school, we are going to   2  some cleaning.The radio says it will be   3   in the night, so please don't forget  4  the windows . The temperature will fall    5   zero tomorrow morning. Please remember to put on   6  clothes . Mr Black is ill and now he'sin   7  . I hope you will go and see him. But you don't need to buy   8   for him . By the way , there's  9  homework for you. You must finish it and  10   it to school tomorrow morning . Now let's begin our cleaning. (     )1. A. say(     )2. A. do(     )3. A. fine(     )4. A. closing(     )5. A. above(     )6. A. much(     )7. A. home(     )8. A. something(     )9. A. some(     )10. A. take B. speakB. getB. rainB. to closeB. onB. moreB. schoolB. anythingB. anyB. bring C. tellC. makeC. warmC. openingC. underC. mostC. hospitalC. nothingC. manyC. carry D. talk      D. have      D. windy     D. to open   D. below     D. a lot     D. office                                     D. everythingD. no        D. show