题目

要实现人与自然的和谐发展，下列措施最合理的是( ) A．通过生物技术手段，转化淀粉生产可再生能源 B．使用化学农药防治病虫害，保证粮食稳产 C．发展生态农业，实现物质和能量的多级利用 D．大力开垦湿地，扩大粮食种植面积   答案：C  现有A、B、C、D、E五种强电解质，他们在水中可电离产生下列离子（每种电解质电离时只产生一种阳离子，而且不重复）。 阳离子H+、Na+、Al3+、Ag+、 Ba2+ 阴离子OH－、 Cl－、CO32－、NO3－、SO42－ 已知：①A、B两溶液呈碱性； C、D、E溶液呈酸性。 ②向E溶液中逐滴滴加B溶液至过量，沉淀量先增加后减少The Simpsons is a famous cartoon (卡通片). It tells about the happy life of an American family. What chores does each of them like and dislike?Tom is the father of the family. He likes sweeping the floor. He often weeds (除杂草) in the garden and washes the car. He never feeds their dog or cooks the meals for his family.Mary is the mother of the family and she is very busy. She always cooks the meals, does the laundry and cleans the house. She never washes the car and changes light bulbs (灯泡).Lisa is the daughter of the family. She likes making her bed. She cleans the table and does the dishes every day. She can’t cook the meals but she is a good helper for her mother.Bill is the son of the family. He only likes feeding the dog and walking it outside. He never cleans his bedroom.判断下列句子的正（T）误（F)【1】Simpsons come from America.【2】Tom often feeds the dog and cooks the meals.【3】Mary cooks the meals in the kitchen.【4】Lisa doesn’t like making her bed doing.【5】Bill never cleans his bedroom.