题干
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。
My parents and I went to the park on last Sunday. There were lots of visitors stood in front of the ticket window. We waited for a long time and buy three tickets. In the Tiger Mountain of the park, I was too eager to see the fierce frightened animals that I quickened my steps through the crowd. Unfortunate, I got separated from my parents. I had hard time looking for him, but I had no luck. Wandering in the park, I felt alone without any companions. Worse still, I had no money, so I had to walk home, covered as much as 5 kilometers.
答案(点此获取答案解析）
①去掉on； ②stood→standing；③buy→bought； ④too→so;⑤frightened →frightening;⑥Unfortunate→Unfortunately;⑦had后面加a ; ⑧him→them;⑨alone→lonely;⑩covered→covering
C02(g)+H2(g)，部分数据见下表(表中t2>t1）：
