2008年北京将举办奥林匹克运动会，奥林匹克运动会的名称来源于古代_______

【化学-化学与技术】浩瀚的海洋是一个巨大的物质宝库．目前世界各国都在研究如何充分利用海洋资源．

（1）如图所示，在电场中利用膜技术（阳离子交换膜只允许阳离子通过，阴离子交换膜只允许阴离子通过）淡化海水，该方法称为电渗析法．

①图中膜a应选用______膜．

②电渗析法还可用来处理电镀废液，写出用该方法处理含硝酸银废液时所发生反应的化学方程式______

（2）海水中的氘（含HDO0.03‰）发生聚变的能量，足以保证人类上亿年的能源消费，工业上可采用“硫化氢-水双温交换法”富集HDO．其原理是利用H₂S、HDS、H₂O和HDO四种物质，在25℃和100℃两种不同的温度下发生的两个不同反应得到较高浓度的HDO．上图为“硫化氢-水双温交换法”所发生的两个反应中涉及的四种物质在反应体系中的物质的量随温度的变化曲线．写出100℃时所发生反应的化学方程式______；工业上富集HDO的生产过程中，可以循环利用的一种物质是______．

I grew up in New Hampshire, a small town in South Canada, where in my father’s words for the seasons were “Spring, Summer, Fairtime and Winter!” At that time, a week-long fair was held in the town every autumn. Thousands of people from other towns came to sell and buy things. It was the busiest time of the year.

When “Fairtime” came, my grandma became the most “useful” and busiest person of the family. Grandma was a kind, well-educated old lady. She was good at cooking. All her rrelatives liked the foodshe cooked. During “fairtime”, they would come to live in her house and have meals there. Grandma was always happy to look after them.

Year after year, many people moved to big cities. There was no loner “Fairtime”. Grandma became very old and was gradually going blind. My parents and I moved to live with Granma in her house. We did our best to make her day-to-day life as comfortable as possible. I was at high school then. What I often did at home was to help Grandma with the daily newspaper’s crossword puzzle. However, she didn’t look happy. She often sat in her room for hours, without saying a word.

To attract people to move back, the Town Hall decided to reopen the Fair. One day, when I came back room school, I saw Grandma wearing her glasses, washing the dishes in the kitchen. With a big smile on her face, she looked a lot much younger. She told me that her two nieces would come. “They said the food I cooked was very delicious and they want to stay in my house again.” Grandma said happily. “They will stay here for one week and we can have a big party. That must be the busiest week I’ve had in years!”

I suddenly realized that Grandma didn’t want to be looked after. She wanted to be “useful”, appreciated and helpful.

小题1:Thousands of people came to the town to __________ at the Fair.

A．enjoy Grandma’s food

B．sell and buy things

C．learn to cook

D．have a big party小题2:Why was Grandma unhappy?

A.She was too busy.   B. No one lived with her.

B.She was not “useful”.  D. She couldn’t see anything

小题3:Which of the following is NOT TRUE according to the passage?

A．Grandma was good at cooking

B．Many people moved to big cities.

C．Grandma didn’t like “Fairtime”

D．Grandma was a kind old lady.小题4:What’s the best title for the passage?

A．Fairtime

B．My “Old” Grandma

C．A Small Town

D．Grandma’s Family

阅读下列材料。

材料一：一个人口几乎占人类三分之一的大帝国，不顾时势，安于现状，人为地隔绝于世并因此竭力以天朝尽善尽美的幻想自欺。这样一个帝国注定最后要在一场殊死的决斗中被打垮。——《马克思恩格斯选集》

材料二：卢沟桥被绑架了/万里长城被列为战利品／作为献给岛国皇妃的项链，南京城改作靶场／划为占领者的猎区。——张志民《以卢沟桥的名义》

材料三：我有一只玩具箱，丢在上海大同坊。飞机汽车件件有，还有娃娃和小床…… 可恨日本鬼子兵，八月十三响炮声……几时收复失地回上海，妈妈再给我买个汽车和小人? ——《失去了的玩具箱》

请回答：

（1）据材料一并结合所学知识，1840—1919年间，清朝是在哪几场战争中被一步步打垮的？

________________________________________________________________________________

（2）据材料二，卢沟桥在哪一年被谁“绑架”的？为什么诗人说“南京城改作靶场”？

________________________________________________________________________________

（3）据材料三并结合所学知识，1945年“我”回到了上海，妈妈又给我买了汽车和小人。请你想一想，中国抗战取得胜利的原因有哪些？

________________________________________________________________________________

选择性絮凝是处理细粒物料的重要方法。目前应用的分离形式大致可归纳成（）等。

A.预先絮凝浮选脱泥

B.絮凝脱泥浮选

C.絮凝脉石后浮选有用矿物

D.粗细分级浮选