题目

下列叙述正确的是（ ） A . 培养皿中的大肠杆菌菌落是生命系统的个体层次 B . 细胞学说认为一切动植物都由细胞发育而来 C . 各种有机分子都因物种不同而存在结构差异 D . HIV、蓝藻和酵母菌共有的结构是核糖体 答案：B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。Disappointed at the result of the examination, I sat on the sofa in silent after school. My father found I was so unhappy but came to ask me why. After learning the reason, my father give me a smile. He said, “Don’t allow the terribly things in your life to discount the positive one. Don’t let a bad day or month or year to make you feel like you have a bad life. Instead focusing on everything that’s going wrong, start holding onto all of the things that is going right. You’ll feel better soon.” Hear what my father said, I felt it the shame to act like that and decided to cheer myself up.