题目

下列物质的分离（或提纯）方法正确的是 A．分离乙醇与乙酸——萃取        B．提纯硝酸钾（含少量氯化钾）——蒸发结晶 C．提纯粗盐（含有泥沙）——蒸馏  D．分离乙酸乙酯和饱和碳酸钠混合液——分液 答案：D 解析: 略Climbing a mountain is hard work. But one step(脚步) after another finally brings a person to the top. Along the way, he can stop and look around. And the higher he climbs, the more wonderful his view is. If he keeps climbing, he will have a new world before him. He will have a new way to see everything. Now learning a foreign language is something like climbing a mountain. This new language can give you a new view of life. And it is more than a look at the surface of things. It can open the way into people’s minds and hearts and into a culture that is very different from your own culture. This will make you richer, richer in things that money can’t buy. Even though you never set foot(踏上) on a ship or a plane, you can be an armchair traveler through books. The mountain climber stops now and then to enjoy the scenery around him. Reading is just like this. If you are interested in it, you will find fun in books.1.Is climbing a mountain easy?_________________________________________________________________________2.What will he have if he keeps climbing?_________________________________________________________________________3.Can learning languages open the way into people’s minds and hearts?_________________________________________________________________________4.How will learning languages make you?_________________________________________________________________________5.Where will you find fun if you are interested in reading?_________________________________________________________________________