题目

将适量的铜粉和镁粉的混合物放入一定量的硝酸银溶液中，充分反应后过滤，得到固体物质和无色滤液。则关于滤出的固体和无色滤液的下列判断正确的是(    ) A. 滤出的固体中一定含有银和铜，一定不含镁 B. 滤出的固体中一定含有银，可能含有铜和镁 C. 滤液中一定含有硝酸银和硝酸镁，一定没有硝酸铜 D. 滤液中一定含有硝酸镁，一定没有硝酸银和硝酸铜1若该行划线单词错误，请在序号右边横线上写出正确的词；2若该行有漏词符号（∧），请在序号右边横线上写出漏词符号，并写上该加的词。3若该行划线单词多余，请在序号右边横线上写出该词，且用斜线（＼）划掉；4若该行划线单词没错，请在序号右边横线上打钩（√）。 We’ve just moved in a house and we want to 1. buy a new color television set, and I’m not 2.　sure about a size. Maybe we should buy a big 3.　one. If we buy a small one, we may have 4.to change for it in a few years’ time for a bigger 5.one. My husband(丈夫） thinks it’s no necessary to buy 6.　a very big one. He said our sitting room isn’t very 7.　big. If we put in a very big television, they will 8.　be good for our eye. Anyway, we’d better make 9.　∧quick decision because the price may go up soon. 10.