关于TPO3的几个阅读问题~~~~大家帮忙嘿~~谢了

lanlan懒UID：2878630

我做TPO3的时候有几个阅读不明白，特向专家们请教一下哈~~
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.
问的是stduy pond 能知道什么principal
我选的是 A change in the numbers of a organism dosen't affect an ecosystem's properties
答案是     A ecosystem properties change more slowly than individual in the system.
◆ Even the kind of stability defined as simple lack of change is not always associated with maximum diversity. At least in temperate zones, maximum diversity is often found in mid-successional stages, not in the climax community. Once a redwood forest matures, for example, the kinds of species and the number of individuals growing on the forest floor are reduced. In general, diversity, by itself, does not ensure stability. Mathematical models of ecosystems likewise suggest that diversity does not guarantee ecosystem stability—just the opposite, in fact. A more complicated system is, in general, more likely than a simple system to break down (A fifteen-speed racing bicycle is more likely to break down than a child's tricycle.)
这道题问的是我们能从文章中infer出redfwood forest的什么？
我选的是   They become less stable as they mature.
答案是      They are found in temparete zones.

【Many ecologists now think that the relative long-term stability of climax communities comes not from diversity but from the "patchiness” of the environment; an environment that varies from place to place supports more kinds of organisms than an environment that is uniform.】
这道题问的是哪个是对的
我选的是  uniform environment cannot be climax communities because they don't support as many types as  patchy  environment.
答案是    A patchy environment is thought to increase stablity because it is able to support a wide variety of organism.

lanlan懒UID：2878630

upupupup

坠坠芙蓉影UID：2815408

第一个问题：我跟你选的一样。关键点是同意转换：more stable约等于more slowly，跟咱选的答案相比更贴切一点。
第二个问题：我还是跟你选的一样。关键点是diversity不等于stability。这一段里有这么一句话提示“In general, diversity, by itself, does not ensure stability.”；另外第三段第一句也说了科学家曾认为diversity能使ecosystem稳定，后来证明是错的。
第三个问题：这种题目我感觉主要是抓主谓宾，最好顺序也不要倒，因为倒了侧重点就不一样了。你选的答案的主语是uniform environment，说明这是重点。但是在原文里uniform environment并不是重点，只是在最后出现了一下，是用来比较衬托重点的。原句的主干是stability来自patchiness，接下去的分句则是继续阐述patchiness，这说明这句话的重点是落在了patchiness上。正确答案的主语也落在了patchiness上。虽然答案没有涉及uniform environment，但不要紧，因为这是次要信息，不一定要体现出来，重点出来就OK了^^

坠坠芙蓉影UID：2815408

还是这一篇ECOSYSTEM的阅读，最后六选三的题目有一个答案我想不通，请教一下。
这是选项前的题目：The process of succession and the stability of a climax community can change over time.
这是第三个选项：○The level of resilience in a plant community contributes to its long-term stability.
不明白为什么答案是这个。文章里就没怎么整段讲resilience啊？怎么就推出了它contributes to stability了呢？谢谢^^