请教GWD-10-4, 好心人帮忙，急！

irislei

1.                  GWD-10-Q4 -Q6
   San Andreas Fault断层成因探析

Prior to 1965 geologists assumed

that the two giant rock plates meeting at

the San Andreas Fault generate heat

Line through friction as they grind past each

(5) other, but in 1965 Henyey found that

temperatures in drill holes near the

fault were not as elevated as had

been expected. Some geologists

wondered whether the absence of

(10) friction-generated heat could be

explained by the kinds of rock composing

the fault. Geologists’ pre-1965

assumptions concerning heat generated

in the fault were based on

(15) calculations about common varieties of

rocks, such as limestone and granite;

but “weaker” materials, such as clays,

had already been identified in samples

retrieved from the fault zone. Under

(20) normal conditions, rocks composed of

clay produce far less friction than do

other rock types.老新观点

In 1992 Byerlee tested whether

these materials would produce friction

(25) 10 to 15 kilometers below the Earth’s

surface. Byerlee found that when clay

samples were subjected to the thousands

of atmospheres of pressure

they would encounter deep inside the

(30) Earth, they produced as much friction

as was produced by other rock types.

The harder rocks push against each

other, the hotter they become; in other

words, pressure itself, not only the

(35) rocks’ properties, affects frictional

heating. Geologists therefore wondered

whether the friction between the

plates was being reduced by pockets

of pressurized water within the fault that

push the plates away from each other.

GWD-10-Q4:

The passage suggests which of the following regarding Henyey’s findings about

temperature in the San Andreas Fault?

A. Scientists have yet to formulate a definitive explanation for Henyey’s findings.

B. Recent research suggests that Henyey’s explanation for the findings should be

modified.

C. Henyey’s findings had to be recalculated in light of Byerlee’s 1992 experiment.

D. Henyey’s findings provided support for an assumption long held by geologists.

E. Scientists have been unable to duplicate Henyey’s findings using more recent

experimental methods.

答案是A，我选的E

我想确认一下A说的是已经有definitive explanation ，还是没有？yet让我有点晕，麻烦帮我解释一下。

还有E为什么不对？

谢谢

[此贴子已经被作者于2009-7-5 12:16:08编辑过]

bubumouse

have yet 是没有

这篇文章讲的是1965年亨利发现断层的热量并不像人们所想的那样but in 1965 Henyey found that

temperatures in drill holes near the fault were not as elevated as had been expected.所以一帮地质学家就开始研究解释这一现象的原因，一开始是认为地质成分，结果不是，大气压力也有影响。然后地质学家就wonder断层中的pressurized water的影响。由于文章到此就结束，所以地质学家还没有给亨利现象一个明确的解释。

E选项 文章中没有提到新的试验手段，也没有提到不能重现亨利的发现