A：世博会前期，处理废水时加入明矾可作为混凝剂以吸附水中的杂质
B：把世博会期间产生的垃圾焚烧或深埋处理
C：某些馆的外壳使用非晶硅薄膜，以充分利用太阳能
D：世博停车场安装催化光解设施,可将汽车尾气中CO和NOx反应生成无毒气体
1905年，爱因斯坦提出了著名的狭义相对论，给物理科学带来了巨大的进步．根据狭义相对论的理论，下列说法中正确的是（ ）
阅读理解 Nancy’s hobby is collecting sharpeners. She spends a lot of time on it after school. She has been collecting more than one hundred sharpeners from different countries. They are all different in color and size. Nancy likes sharpeners with animals and birds on them. In this way, she learns the names of many animals and birds. She also borrows books on animals and birds from her school library. She learns a lot about them from books. Sometimes Nancy has many sharpeners of the same kind. She gives them to her friends. Then they give her other different sharpeners in return. Nancy has many pen pals in many countries. She sends them sharpeners of her country. In return, they send her sharpeners of their countries. Nancy’s father also gives her sharpeners. He brings them home from his friends for her. Many of Nancy’s friends collect other things. Some collect coins and others collect matchboxes（火柴盒）or stamps. But, all of them say that Nancy’s collection is the most interesting of all.
