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标题: 大全102 （2/17）求教：有无人读了此文？ [打印本页]

作者: zcx 时间: 2004-3-30 01:03
标题: 大全102 （2/17）求教：有无人读了此文？

85. The passage suggests that which of the following is a prediction concerning meteor streams that can be derived from both the conventional theories mentioned in line 18 and the new computer-derived theory?文章中这一题的答案是d

fficeffice" />D) Meteor showers caused by older meteor streams should be, on average, longer in duration than those caused by very young meteor streams.偶没看懂og的其中一段解释：

According to lines 7-8 of the passage, the conventional theories hypothesized that meteor streams should broaden with time, and the computer simulation confirmed this hypothesis.

明明文章中说旧观点是中心密度大，根本没有说旧观点也假设流星流随着时间推移而变宽，请问og 的解释是哪来？文章出处再哪？

作者: zcx 时间: 2004-3-30 21:29
我怎么觉得hypothesis的那句话是新观点的？旧观点我只觉得是conventional的那句话，但是仔细看看，好像hypothesis那句用的是完成时，有点像。。。。。。

作者: weiyu 时间: 2004-3-30 23:36
Astronomers have hypothesized that a meteor stream should broaden with time as the dust particles’ individual orbits are perturbed by planetary gravitational fields.(提出一个假设) A recent computer-modeling experiment tested this hypothesis by tracking the influence of planetary gravitation over a projected 5,000-year period on the positions of a group of hypothetical dust particles (利用计算机模拟验证行星引力对流行尘的作用). In the model, the particles were randomly distributed throughout a computer simulation of the orbit of an actual meteor stream, the Geminid. The researcher found, as expected, that the computer-model stream broadened with time(流行河随时间展宽). Conventional theories, however, predicted that the distribution of particles would be increasingly dense(说明对于流行河展宽一致的) toward the center of a meteor stream. Surprisingly, the computer-model meteor stream gradually came to resemble a thick-walled, hollow pipe.(传统观点和计算机模拟对流行河形状预测的差别)

时间增加, 流行河越宽, 地球通过其的时间间隔月长.

作者: zcx 时间: 2004-3-31 09:02
正是因为一开始提出的是一个假设，计算机模型只是验证了这个假设，所以我没有把假设看成是传统观念。题目问的是既符合传统也符合新观念的冬冬，所以我就找不着两种观念共同的冬冬。

作者: freedownload 时间: 2004-4-30 01:14
这题我也错了，ETS现在的招数是比较毒辣，我觉得这文章很容易，觉得基本上把握住了，没有想到ETS在题目里面可是下了很多工夫的。

作者: paopao 时间: 2004-4-30 02:13

同意这篇文章读似简单其实非常考验对结构的认识

题目太难可以读读OG的解释只是真要考试中碰到了非死不可

作者: zcx 时间: 2004-5-1 11:14

today i read the article again and found that the easier the article seems to be, the more difficult the questions are.

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