ChaseDream

标题: 想不通,问个可能会被扁的问题,求教! [打印本页]

作者: yzfanglinyun 时间: 2007-3-26 00:54
标题: 想不通,问个可能会被扁的问题,求教!

Meteorologists say that if only they could design an accurate mathematical model of the atmosphere with all its complexities, they could forecast the weather with real precision.But this is an idle boast,immune to any evaluation,for any inadequate weather forecast would obviously be blamed on imperfections in the model.

Which of the following,if true,could best be used as a basis for arguing against the author’s position that the meteorologists’ claim cannot be evaluated?

A . Certain unusual configurations of data can serve as the basis for precise weather forecasts even though the exact causal mechanisms are not understood

B. Most significant gains in the accuracy of the relevant mathemarical models are accompanied by clear gains in the precision of weather forecasts.

C. Mathematical models of the meteological aftermath of such catestrophic events as volcanic eruptions are beginning to be contructed

D. Moern weather forecasts for as much as a full day ahead are broadly correct about 80 percent of the time

E.Meteotologists readily concede that the accurate mathematical model they are talking about is not now in their power to construct

Which of the followng ,if true, would cast the most serious doubt on the meteorologists’boast, aside from the doubt expressed in the passage above?

A. The amount of enengy that the Earth receives from the Sun is monitored closely and is known not to be constant

B. Volcanic eruptions,the combustion of fossil fuels,and several other processes that also cannot be quantified with any accurary are known to have a significant and continuing impact on the constitution of the atmosphere

C. As current models of the atmosphere are improved, even small increments in complexity will mean large increases in the number of computers required for the representation of the models

D. Frequent and accurate data about the atmosphere collected at a large number of points both on and above the ground are a prerequisite for the construction of a good model of the atmosphere.

E. With existing models of the atmosphere large scale weather patterns can be predicted with greater accuracy than can relatively local weather patterns.

为什么两条都选B,想不通,高手指点迷津,祥解一下嘿嘿,多谢了!

作者: pumpkin 时间: 2007-3-26 00:57

请楼主在标题里面给出题目出处，方便大家回帖，方便后人查询，谢谢啊

GMAT逻辑区格式和搜索
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=74827

方便自己，方便他人，感谢您的理解和支持！