一均匀物体恰能悬浮的水中，若将此物体切成大小不等的两块，则（  ）

    I live in a nice new building in Beijing. It is very tall. It has eighteen floors. There are about eighty families in the building. That is to say (也就是说), about two hundred and forty people live in the building.

    My home is on the twelfth floor. We have two bedrooms and a living room. They are big and clean. There are a lot of big trees and beautiful flowers around our building. I like looking out of the window in my room. I can see cars and buses running in the street. I can see people walking in the street, too. They look so small! I can also see a lot of tall buildings. How beautiful Beijing is! I am happy to live in this nice, new and tall building.

我国发射的“神舟六号”载人飞船，与“神舟五号”飞船相比，它在更高的轨道上绕地球做匀速圆周运动，如图所示，下列说法中正确的是（   ）

世界著名的盲聋作家,社 会活动家海伦、凯勒，从小就生活在一个没有声音，没有光明的世界里。在老师的帮助下，坚强的海伦学会了说话，诗书，通晓好几个国家的语言成为著名作家，另外她还积极投身于社会公益事业，为社会进步作出了贡献，这说明（   ）

①自立者才能走向自强之路                                          ②自强者才能积极进取，不断超越自己

③自强者才能努力完善自己，积极服务社会              ④只有出生于苦难当中，人才能学会自强

根据不同物质的性质不同，可以进行物质鉴别．将下列有关性质前的标号填在相应的括号中，从而区分各组物质．

A．气味    B．味道   C．颜色   D．状态

（1）冰和水　____ 　；

（2）铁和铜　____ ；

（3）食盐和蔗糖　____ 　；

（4）酒精和汽油____ ．