下面就让小编来为大家介绍一下阅读疑难解答的相关内容吧，希望能够给准备托福考试的同学带来帮助。
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 lifeform 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.
which of the following can be inferred from paragraph 1 about oth the upper and lower timberlines?
A. Both are treeless zones.
B. Both mark forest boundaries.
C. Both are surrounded by desert areas.
D. Both suffer from a lack of moisture.
答案是B
但我选择的是A，不知道那句话暗示了B是正确选项呢?看了好几遍都没明白。
回答举例：
这道题目关键是要读懂题干：题干的关键字是both，表明考的是两者的共性。
那么你自然要回去找两种timberline的共同点，共同点往往是同义表达。
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.
我把关键字都标出来了。这个就是阅读理解的真正过程。如果你看了很久都没有看懂，原因可能是你只关注了具体单词的含义，却没有关注词汇之间的关系。
这道题目应该这样去理解：
读到第一句话Transition的时候，我们应该把transition认为是一个抽象概念。而读第二句话的时候，应该带着transition这个未解之谜来读，看看第二句与第一句的关系。很明显，第二句中出现了trees disappear and are replaced这些动作，很明显，这是对于transition的具体解释。第三句将这种transition定义为timberline了，这样也就可以把A选项排除了。因为A说的是tree-less zone，而很明显，原文的timeberline并不是无树，而是 a zone of transition。第四句用also这个词给出了同类现象lower timberline，而transition 又再次出现，只不过换成了pass into这个词。lack of moisture这个细节只在最后出现，不是两者共性。
因此，共性就是transition.
再抽象一点：第一句抽象，提出一种自然现象，第二句具体解释，第三句将自然现象定义为一个术语，第四句提出自然现象的同类现象。题目考这两个现象的共性。
但是这道题的最难的一点是读懂原文与答案的对应关系。但其实这个貌似很难的问题的解决方案却非常简单。症结在于，我们对于词汇的理解不够准确。
其实boundary 就是border: the official line that divides one area of land from another。根据boundary这个词的含义，我们就不难看出，其实原文中的timberline其实就是一个zone，divides forest from other plants.
结论：
1. 读原文要重句间关系，轻具体含义。
2.背单词不仅要提高数量，还要提高质量。
以上就是百利天下老师为大家总结的有关阅读疑难解答的内容，希望大家在学习时能灵活运用，注意积累托福备考经验。最后，小编祝大家在托福考试中取得好成绩！
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