题目

硝酸铜为蓝色固体,溶于水可得蓝色溶液。小明同学用如图所示装置加热硝酸铜,发现固体由蓝色逐渐变黑,同时产生红棕色有刺激性气味的气体,带火星的木条复燃。 通过查阅资料并进行实验验证,可知Cu(NO3)2受热分解生成了CuO 、NO2和O2(2Cu(NO3)22CuO+4NO2↑+O2↑)。相同条件下,气体分子个数比约为体积比。小明同学依据“加热硝酸铜产生的气体能使带火星的木条复燃”的实验现象,推出NO2具有助燃性。你是否同意他的结论,并说明理由:                  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。I was reading an article in a newspaper when I came across a word I don’t know. “Dad, would you explain with me what the word ostensibly means?” My dad, as he more often did after works, was watching his favorite show. He replied immediate, “You have a dictionary don’t you? Just help yourself.” Without look at my face, he continued enjoying my show. I went back to my room, on my study table was that dictionary, what Dad bought me as a birthday gift. I will remember a lesson Dad taught me forever: Help myself all the time.