题目

The little girl _____ go out at night and often imagined _____ a monster following her     A．dared not；there being     B．dare not；there being C．did not dare；there to be    D．didn’t dare to；there be 答案：A 解析: 略下列除杂方案不正确的选项被提纯的物质[括号内的物质是杂质]除杂试剂除杂方法ACO2(g) [HCl(g)]饱和碳酸氢钠溶液、 浓H2SO4洗气BNH4Cl(aq) [Fe3＋(aq)]NaOH溶液过滤CCl2(g) [HCl(g)]饱和食盐水、浓H2SO4洗气DNa2CO3(s) [NaHCO3(s)]—加热A. A B. B C. C D. D