题目

(8分)实验室有一瓶标签受损的无色溶液，如下图所示。老师要求同学们进行探究：这瓶溶液到底是什么溶液？【提出猜想】 提示：这瓶无色溶液只能是下列四种溶液中的一种：①硫酸镁溶液、②硫酸钠溶液、③硫酸溶液、④硫酸铵溶液【查阅资料】 A：常温下，相关物质的溶解度如下：物质MgSO4Na2SO4H2SO4(NH4)2SO4溶解度35.1g19.5g与水任意比互溶75.4gB：MgSO4、(NH4)2SO4的水溶液显酸性请回答：【小题1】该无色溶液一定含有的离子是         ；【实验探究】1  The family man? Father was a hardworking man who tried his best to support his wife and three children. He spent all his evenings attending classes, hoping to improve himself so that he could one day find a better-paid job, except for Sundays. Father hardly ate a meal together with his family. He worked and studied very hard because he wanted to provide his family with the best things that money could buy. Whenever the family complained that he was not spending enough time with them, he reasoned that he was doing all this for them. But he often wished to spend more time with his family. The day came when the examination results were announced. To his joy, Father passed with a good mark! Soon after , he was offered a good job as a senior supervisor (主管), which paid quite well. However, the family still did not get to see Father for most of the week. He continued to work very hard, hoping to get the position of manager. Again, whenever the family complained that he was not spending enough time with them, he reasoned that he was doing all this for them. But he often wished to spend more time with his family. Father’s hard word paid off and he was promoted(提升). Excitedly, he decided to hire a maid so his wife did not have to do the housework any more. He also felt that their three-room flat was not longer big enough, and it would be nice for his family to be able to enjoy the comfort of a condominium(公寓). Having experienced the rewards of his hard work many times before, Father decided to further his studies and work at being promoted again. The family still did not get to see much of him again. As expected, father’s hard work paid off again and he bought a beautiful condominium near the coast of Singapore. On the first Sunday evening in their new home, father told his family that he had decided not to take any more courses or pursue(追求) any more promotions. From then on he was going to spend more time with his family. Father did not wake up the next day. 1.Father worked seven days a week, didn’t he ? 2.Why did father work and study hard? 3.What was father’s first well-paid job? 4.What did the family complain about father? 5.Where did father manager to buy a beautiful condominium for his family? 6.Do you want to have the “father”in your family? Why or not?