题目

100 mL浓度为2 mol·L－１的盐酸跟过量的锌片反应，为加快反应速率，又不影响生成氢气的总量，可采用的方法是A.加入适量的6 mol·Ｌ－１的盐酸     B.加入数滴氯化铜溶液C.加入适量蒸馏水                  D.加入适量的氯化钠溶液   答案：B解析: 假定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：在错的词下划一横线，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。Growing up, I was fortunate have parents who taught me lessons by where they lived each day. I remember walk to a nursing home with my father one Saturday. When we arrive there, I asked him for money for the collection box. My father reached into his pocket and handed him a coin. I was embarrassing by the amount of money he gave me so I asked him for more. In a reply, he taught me a valuable lesson: What is important is the reason for giving, not how many money you give. Years late, I found out' my father didn't have any spare money to give on the time, but he always gave what he could.