题目

如图甲，组成物质的分子具有较高的能量时，分子间作用力很弱，分子可以不受约束地自由运动；如图乙，当外界温度骤然降低或对分子加压时，分子间距变小，分子间作用很强，只能在一定的位置附近振动。分子从图甲直接变到图乙的过程，在宏观上表现的物态变化为 ___________。 答案：凝华 【解析】 【详解】 由图中可知，图甲中分子间间隙较大，分子排列无规律，是气态分子，图乙中分子间间隙较小，分子排列有规律，是固态分子，故分子从图甲直接变到图乙的过程是由气态直接变为固态的过程，在宏观上表现的物态变化为凝华。假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误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。Dear Mr. Black,I’m Tim, the exchange student from China. I had been studying in your school for a year. I am deep moved by the kindness of people around. That I want to say first is that the teachers here are very friendly. They do what they can help me and encourage me to study hard. Whenever I ask for questions, they give satisfactory answers. Besides, my classmates offer me a lot of help, too. We get on well with each other and I have made quite a few good friend. At home, Walter’s parents take good care of me, treating me as if I am their own child.I’m so grateful for all these people, with whom help I have been accustomed to American culture and gained a lot of knowledge.