自然环境与人们的生活息息相关。人类不合理地开发和利用自然资源，会对环境造成破坏。寻找源头治理环境是当今化学工作者面临的重要任务。下列有关环境及环境保护方面的说法不正确的是( )
A．重金属污染物，如汞、镉、铅、铬等对水体能造成污染，必须经过处理后才可排放
B．生活污水中所含的氮、磷化合物是植物营养素，过多排放会引起赤潮、水华等
C．向煤中加入适量石灰石，发生反应2CaCO3＋O2＋2SO2===2CaSO4＋2CO2，可大大减少燃烧产物中SO2的量
D．所有白色物质(如：白纸、白面、白布等)遗留在自然界都能引起白色污染
答案：D
题目分析：白色污染是人们对难降解的塑料垃圾(多指塑料袋)污染环境现象的一种形象称谓。它是指用聚苯乙烯、聚丙烯、聚氯乙烯等高分子化合物制成的各类生活塑料制品使用后被弃置成为固体废物，由于随意乱丢乱扔，难于降解处理，以致造成城市环境严重污染的现象。所以不是所有白色物质遗留在自然界都能引起白色污染。D错误。
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| A young man was getting ready to graduate from college, for many months he had 1 a beautiful sports car in a dealer's showroom, and 2 his father could well 3 it, he told him that was all he wanted. On the morning of his gradation day his father called him into his own study and told him how 4 he was to have such a fine son. He handed his son a beautiful gift box. 5 but slightly disappointed, the young man 6 the box and found a lovely book, 7 , he raised his voice at his father and said. " With all your money you give me a book?" And rushed out of the house 8 the book in the study He did not contact(联系)his father for a whole year until one day he saw in the strict an old man who looked like his father. He 9 he bad to go back home and see his father. When he arrived at his father's house, he was told that his father had been in hospital for a week. The moment he was about to 10 the hospital. he saw on the desk the still new book ,just as he had left it one year ago. he opened it and began to 11 the pages. suddenly, a car key 12 from an envelope taped behind the book ,it bad a lag(标签)with dealer's name, the 13 dealer who had the sports car he bad 19 on the tag was the 20 of his graduation. and the word PAID IN FULL | ||||
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