题目

下列叙述正确的是( ) A．95℃纯水的pH<7，说明加热可导致水呈酸性 B．pH＝3的醋酸溶液，稀释至10倍后pH＝4 C．0.2 mol·L－1的盐酸与等体积水混合后pH＝1 D．pH＝3的醋酸溶液与pH＝11的氢氧化钠溶液等体积混合后pH＝7 答案：C假设英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号（），并在其下面写出该加的词。删除：把多余的词用斜线（\）划掉。修改：在错的词下画一横线，并在该词下面写出修改后的词。注意：1. 每处错误及其修改均仅限一词；2. 只允许修改10处，多者（从第11处起）不计分。A shop owner told me a story, that moved people in the neighborhood deep. One day, a hungry homeless dog came and the owner gave it up some food to eat. To his surprise, it comes to his shop whenever he opens a door. The owner has gradually realized that it doesn’t come for food and repays him. Every day, it sits besides the goods outside the shop and acts for a guide. When customer come near, it barks to remind the owner come out to serve them. Thus, the dog has found a home and the owner had a faithful employee.