From her expression, we know that she di

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问题选择题

From her expression, we know that she didn’t understand the meaning．

A．amazing

B．surprising

C．puzzled

D．satisfied

答案

答案：C

填空题

在硝酸银溶液中加入盐A的溶液，产生白色沉淀。过滤后在滤渣中滴加稀硝酸，沉淀不溶解；在滤液中再加入钠盐B的溶液，又产生白色沉淀。过滤后在滤渣中滴加稀硝酸，沉淀不溶解。则A是_________；B是_______。

选择题

I have never seen _____ film before. [ ]

A. a so interesting

B. a such interesting

C. so a interesting

D. such an interesting