xiecb675: 91. Arid regions in the southwestern United States have become increasingly inviting playgrounds for the growing number of recreation seek...(2010-01-01 18:49)
xiecb675: 81. Television the most pervasive and persuasive of modern technologies, marked by rapid change and growth, is moving into a new era, an e...(2010-01-01 18:49)
xiecb675: 71. People in prehistoric times created paints by grinding materials such as plants and clay into power and then adding water.
71.史前的人们...(2010-01-01 18:49)
xiecb675: 61. Buyers and sellers should be aware of new developments in technology can and does affect marketing activities.
61.购买者和销售者都应该留意技术的新发...(2010-01-01 18:48)
xiecb675: 51. Using many symbols makes it possible to put a large amount of inFORMation on a single map.
51.使用多种多样的符号可以在一张地图里放进大量的信息
52. Anarc...(2010-01-01 18:48)
xiecb675: 41.尤它州制造业的年产值大于其工业和农业的总和。
42. The wallflower is so called because its weak stems often grow on walls and along stony cliffs for support...(2010-01-01 18:48)