题目

匹配题。⑴ one two three four fivebook/books⑵ one two three four fivedesk/desks⑶ one two three four fivegirl/girls⑷ one two three four fiveteacher/teachers⑸ one two three four fiveschool/schools 答案：【1】one school【2】four books【3】two girls【4】five desks【5】three teachers16．下列说法错误的是（　　）A．多数合金的抗腐蚀性能比组成他们的纯金属好B．铵态氮肥与熟石灰混合使用可以明显提高肥效C．硫酸铜溶液能一次性判断金属锌、铜、银的活动性顺序D．除去NaNO3溶液中的Na2SO4，可加适量Ba（NO）2溶液后再过滤