题目

阅读下面短文，在空白处填入适当的内容（一个单词）或括号内单词的适当形式。 【2019 • 湖北省天门、潜江、仙桃、江汉油田】An illusion(错觉) is something that fools the senses or the mind. An illusion may make you feel something exists(存在） when it really _46__(do) not. It may be something that appears to be one thing, but it's really something else. David Copperfield calls __47__ (he) an illusionist. He is someone who makes or creates illusions. Many people have an interest in magic, but __48_ (many) of them are not performing and 关于浓度均为0.1 mol/L的三种溶液：①氨水、②盐酸、③氯化铵溶液，下列说法不正确的是  [     ] A．c(NH4+)：③>①  B．水电离出的c(H+)：②>①  C．①和②等体积混合后的溶液：c(H+)=c(OH-)+c(NH3·H2O)  D．①和③等体积混合后的溶液：c（NH4+）>c（Cl-）>c（OH-）>c(H+)