·天新网首页·加入收藏·设为首页·网站导航
数码笔记本手机摄像机相机MP3MP4GPS
硬件台式机网络服务器主板CPU硬盘显卡
办公投影打印传真
家电电视影院空调
游戏网游单机动漫
汽车新车购车试驾
下载驱动源码
学院开发设计
考试公务员高考考研
业界互联网通信探索
您现在的位置:天新网 > 考试 > GRE > GRE 动态
GRE阅读综合辅导:63题新东方网络课堂总结(十一)
http://www.21tx.com 2008年09月28日

1 2 3 4 5 6 7 8 9 10 下一页

Passage 26问题解决型(专业性科学文章)
提出四个标准——提出问题In choosing a method for determining climatic conditions that existed in the past, paleoclimatologists invoke four principal criteria*2C. First, the material—rocks, lakes, vegetation, etc.—on which the method relies must be widespread*7 enough to provide plenty of information, since(小原因,可以暂时不看) analysis of material that is rarely encountered will not permit correlation with other regions or with other periods*7 of geological history. Second, in the process of formation, the material must have received an environmental signal that reflects a change in climate and that can be deciphered破译,解码 by modern physical or chemical means. Third, at least some of the material must have retained the signal *6unaffected by subsequent changes in the environment*6D. Fourth, it must be possible to determine the time at which the inferred climatic conditions held. This last criterion is more easily(比较句,很可能出题) met in dating marine sediments*1, BECause(小原因,暂时不用看) da

上一篇: GRE考试核心词汇表(S)(第七篇)
下一篇: GRE考试核心词汇表(S)(第五篇)

1 2 3 4 5 6 7 8 9 10 下一页

关于我们 | 联系我们 | 加入我们 | 广告服务 | 投诉意见 | 网站导航
Copyright © 2000-2011 21tx.com, All Rights Reserved.
晨新科技 版权所有 Created by TXSite.net