学习化学过程中有许多“不同”．下列对“不同”的分析错误的是（ ）
A．CO与CO2性质不同﹣﹣分子构成不同
B．铁丝与铜丝化学性质不同﹣﹣构成的原子不同
C．金刚石与石墨性质不同﹣﹣由不同碳原子构成
D．O2急救病人而O3则不能﹣﹣性质不同
答案：C
题目分析：A、CO与CO2分子构成不同，决定了CO与CO2性质不同．故A正确；B、铁与铜构成的原子不同，所以，铁丝与铜丝化学性质不同．故B正确；C、金刚石与石墨的碳原子的排列不同，决定了金刚石与石墨性质不同．故C错误；D、O2和O3分子构成不同，决定了O2和O3性质不同，O2急救病人而O3则不能，故D正确
信息归纳（本题共5小题，每小题2分，共10分） 阅读下面材料，完成信息卡。 Beethoven, a famous musician in the world, was born in Germany in 1770. In his childhood Beethoven didn’t have a happy life. His father was a singer. When he was only four, his father began to make him practice hour after hour on different musical instruments. If he did not put his heart into it, his father would beat him or make it hard on him. Beethoven loved music an he learned so fast that he was able to go around to give concerts, when he was only a boy of eleven. At the age of seventeen, he won high praise from Mozart, the great musician at that time. Beethoven was often poor an ill during his life. After one illness, he suddenly found himself deaf. At that time he was only thirty-one. It was a blow (打击) to him indeed. But he still went on working and writing music pieces. To people’s surprise, some of his best pieces were written after he lost his hearing. In 1827, leaving more than 300 pieces, the great musician died. But his name is still remembered to his day. Information Card
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