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  3. What does the forest strike mankind as permanent? In a "primary succession", what makes it possible for mosses to take root?

What does the forest strike mankind as permanent? In a "primary succession", what makes it possible for mosses to take root?

admin2012-11-30  66
问题 What does the forest strike mankind as permanent?
In a "primary succession", what makes it possible for mosses to take root?
选项 A、The type of rock.
B、The amount of sunlight.
C、The amount of moisture.
D、The effect of lichens.
答案D
解析 本题为一般阅读理解题，需从段落的字里行间中找答案。第三段的第二句话中，作者提到了首先能在岩石上生存的植物是lichen(地衣)，然后在地衣生长之后，由于地衣的影响才能使moss(苔藓))的生长成为可能。
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