题目

The English are well known for their politeness: it’s everywhere. When squeezing (挤过去) past someone in a narrow passage, people say “sorry”. When getting off a bus, English passengers say “thank you” rather than the driver. In Germany, people would never dream of doing these things. After all, squeezing past others is sometimes unavoidable, and the bus driver is only doing his job. I used to think the same way, without questioning it, until I started traveling to the British Isles, and here are some more polite ways of interacting (交往) with people in UK. People thank经测定某溶液中离子只有Na+、CH3COO-、H+、OH-四种，且离子浓度大小的排列顺序为：c(CH3COO-)＞c(Na+)＞c(H+)＞c(OH-)，其可能的情形是(    ) A.该溶液可能由0.1 mool／L的CH3COOH溶液与0.1 mol／L的NaOH溶液等体积混合而成B.该溶液可以由pH=3的CH3COOH与pH=11的NaOH溶液等体积混合而成C.该溶液中离子浓度的关系符合c(CH3COO-)+c(OH-)＞c(Na+)+c(H+)D.在上述溶液中加入适量NaOH，离子浓度大小可改变为c(CH3COO-)＞c(Na+)＞c(OH-)＞c(H+)