单项选择题

It can be inferred from the third paragraph that earlier generations didn't realize ______.

A．the interdependence of water, soil, and living things
B．the importance of the proper use of land
C．the harmfulness of soil destruction and river floods
D．the value of the beauty of nature

<上一题目录下一题>

热门试题

单项选择题

To avoid the mistakes of our forefathers, the author suggests that ______.

A．we plant more trees
B．we return to nature
C．natural sciences be taught to everybody
D．environmental education be directed toward everyone

单项选择题

What does the author imply by saying living space.., is figured ... also in cubic volume above the earth ( Lines 7- 8, Par

A．3) A. Our living space on the earth is getting smaller and smaller.B. Our living space should be measured in cubic volume.C. We need to take some measures to protect space.D. We must preserve good living conditions for both birds and animals.