[求助]关于一道TPO的阅读【推理题】

MD100UID: 3313921

Paragraph 5: 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.)

7. Which of the following can be inferred from paragraph 5 about redwood forests?
A.They become less stable as they mature.
B.They support many species when they reach climax.
C.They are found in temperate zones.
D.They have reduced diversity during mid-successional stages.


我疑惑A选项，是说推理题，不能根据例子里面的内容进行推理吗？

MD100UID: 3313921

求解答啊啊啊啊

zhu773UID: 3297456

例子里面是说，当红木成熟的时候，红木林里的其他物种种类和数量会减少  而不是红木不稳定。 因为这一段讲的是物种的稳定性与其所在环境的物种多样性没有关系。 举这个例子是为了解释前面的一句话。前面讲物种的最大的多样性是在mid-successional ，而不是在climax community。 而红木是属于climax community。所以例子说当红木成熟的时候，在他那个环境中的物种会减少。根据排除法ABD都不对，只有选C了

myishhUID: 3531334

本题我毫不犹豫自信满满的选了D