单项选择题

In a "primary succession", what makes it possible for mosses to take root

A．The type of rock.
B．The amount of sunlight.
C．The amount of moisture.
D．The effect of lichens.
<上一题 目录 下一题>
热门 试题

单项选择题
What does the forest strike mankind as permanent
A．The trees are in community.
B．The forest is renewed each season.
C．Man's life is short in comparison.
D．It is an essential part our lives.
单项选择题
The fox, in this passage, is ______.
A．admired for his trickery
B．no match for the lion
C．pitied for his trick
D．considered worthless
相关试题