单项选择题

Which of the following is the ultimate reason for the decline of tropical rain forests

A．Unfavorable climate.
B．Human abuse of forests.
C．Increase in the temperature.
D．Unusual rainfalls.
<上一题 目录 下一题>
热门 试题

单项选择题
What do people usually think contributed to the decline of North Africa
A．Human factors.
B．Economic factors.
C．Climatic factors.
D．Population factors.
单项选择题
Seriously-deformed zones appear _______.
A．whenever the crusts move over mantle
B．when the plates move towards each other
C．in the narrow boundaries where two plates meet
D．to be the major topographical feature of the Earth
相关试题