单项选择题

The passage is mainly about

A．the relationship between climate change and civilization.
B．the history of global climate change.
C．the interaction between nature and human society.
D．the impact of the spread of agriculture:

<上一题目录下一题>

热门试题

单项选择题

The invention of irrigation is meaningful because it could help to

A．alleviate farmers' workload.
B．increase agricultural production.
C．make planting much easier.
D．get rid of human laziness.

单项选择题

Which of following tends to warm the climate

A．To develop the irrigation system.
B．To promote organic agriculture.
C．To revert to hunting and gathering.
D．To turn farmland back into forest.