题目

将下列各种铁的化合物溶于稀盐酸中，滴加硫氰化钾溶液没有颜色变化，再加入氯水，溶液呈红色的是 （）。A.FeS    B.Fe2O3C.FeCl3    D.Fe2（SO4）3 答案：A【试题分析】B、C、D项中的三种物质溶于盐酸后，溶液中均含有Fe3+，滴加KSCN溶液后溶液均呈红色；A溶于盐酸后所得的FeCl2溶液再加入氯水后，发生反应：2Fe2++CL2=2Fe3++2Cl-，生成了Fe3+，溶液呈红色。故答案为A。阅读下列短文，根据短文内容填写表格，每空限填一词。Do you want to be the most popular person in the class? You don’t need to change your character; you just need to improve your personality. The most popular people are trusted (信任) and loved because they stay normal but still have something that makes them different from the rest of us. Here are some pieces of advice on how to become the most popular person in the class.·If you want others to like and respect (尊重) you, you have to start by liking yourself. Do not change yourself in order to please others.·Be helpful to everyone and do it happily. Being nice to people is almost like helping them, too, because by being nice you make others happy.·Be active and have a positive attitude (积极的态度) towards life. Develop confidence in yourself.·Stay clean and wear fresh clothes. Do not try to follow fashion to please others.Respect cannot be bought with big words or money. You have to get it by being honest. It also helps your personal growth. You must be a person that can be trusted to get respect.To be a1.person Something you don’t need to do ·Don’t try to follow2.or change yourself to make others pleased.·You can’t3.respect with big words or money. Something you4. to do ·Win others’ respect5.liking yourself.·Be honest, helpful and6.to everyone.·Have an7.and positive attitude towards life and develop confidence in yourself.·8.fresh clothes and keep clean. Conclusion (9.your personality instead of10.your character, and you will be popular.