[請益] TPO1 Timberline Vegetation on Mountains

[alvinyeh (alvin)]

Paragraph 1：The transition from forest to treeless tundra on a mountain
slope is often a dramatic one. Within a vertical distance of just a few tens
of meters, trees disappear as a life-form and are replaced by low shrubs,
herbs, and grasses. This rapid zone of transition is called the upper
timberline or tree line. In many semiarid areas there is also a lower
timberline where the forest passes into steppe or desert at its lower edge,
usually because of a lack of moisture.

3. Which of the following can be inferred from paragraph 1 about both the
upper and lower timberlines?
1 Both are treeless zones
2 Both mark forest boundaries.
3 Both are surrounded by desert areas.
4 Both suffer from a lack of moisture.


請問一下，答案是2
但是我實在不懂為什麼1不行，應該是我沒有讀懂，
在選答案的時候，就是覺得1和2都對，
麻煩高手解答一下
感謝感謝。

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推 babykitten:不知道你看這篇有沒有什麼單字是不會的? 老實說我看完
→ babykitten:第一次跟你選的答案是一樣的XDD 可是你仔細去看他的描
推 babykitten:述會發現真的treeless的地方其實是tundra/steppe/deser
→ babykitten:這想法有點抽像~"~ 你有沒有看到最後一句"passes into"
→ babykitten:這個字應該看起來比較有感覺吧? 就是一過了lower
→ babykitten:timberline 下面的區域就變成steppe desert 這個概念
→ babykitten:也有跟"edge"呼應 我不曉得這對你有沒有幫助 不過我看
→ babykitten:第二次的體會是這樣^^"
推 louis925:重點是transition這個單字，timberline是從有樹木到沒樹
→ louis925:的一條界線，所以是forest boundaries
→ louis925:也許你要回憶一下高中地理的描述XD
推 babykitten:推樓上 其實我一開始也想說是高中地理......XDD
→ babykitten:但原PO應該是被"zone"騙了~"~
推 DarkD:靠我當初選2，可是我現在看感覺1也能infer出來= ="
推 DarkD:不過要解釋的話，應該是lower timberline無法infer出
推 justya:我覺得他是一個從多到少的過渡區域 所以真正treeless的應該
→ justya:是desert之類的,timberline只是開始變小顆，沒說變少