黃金閱讀5.3 第19篇 - 英檢

請教一個問題

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?

(1)They become less stable as they mature.
(2)They support many species when they reach climax.
(3)They are found in temperate zones.
(4)They have reduced diversity during mid-successional stages.

正確答案是(3)

我的答案是(4)

不過我實際上是 兩個都想選 很模稜兩可

請問一下 一般要怎樣判斷這整題目

謝謝

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