TPO3 阅读

juliagoUID: 2912431

Paragraph 2: An ecologist who studies a pond today may well find it relatively unchanged in a year’s time. Individual fish may be replaced, but the number of fish will tend to be the same from one year to the next. We can say that the properties of an ecosystem are more stable than the individual organisms that compose the ecosystem.

3. According to paragraph 2, which of the following principles of ecosystems can be learned by studying a pond?
○Ecosystem properties change more slowly than individuals in the system.
○The stability of an ecosystem tends to change as individuals are replaced.
○Individual organisms are stable from one year to the next.
○A change in the members of an organism does not affect an ecosystem’s properties



为什么选A， 不选D呢?
文章并没有提到ecosystem propeties change more slowly 啊？

crysmileUID: 2528832

大概翻译了一下：”研究池塘的生态学家可能会发现：它在一年内保持相对不变。个体的鱼也许会被替代，但是鱼群的总数从这一年到下一年往往是一样的。我们可以说，生态系统的性质比构成生态系统的个别生物体更稳定。“

选项A是第二段的最后一句同义替换，A比B稳定就相当于A变化的速度比B慢。
而D选项没有依据，原文并没有说生物个体数量的改变不会影响生态系统的性质。:)

juliagoUID: 2912431

懂了, 谢谢 2# crysmile

rainandcmUID: 2442269

the properties of an ecosystem are more stable than the individual organisms that compose the ecosystem.这里的more stable就是解题点