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The main difference between contemporary dams and Dujiangyan system is that the former block the flow of water while Dujiangyan allows water to flow naturally。

The main difference between contemporary dams and Dujiangyan system is that the former block the flow of water while Dujiangyan allows water to flow naturally。
A.正确
B.错误
正确答案：A

上一条：The Dujiangyan Irrigation System was launched and completed by Li Bing, a governor of Sichuan 2000 years ago。

下一条：So far, the water（）releasing ritual has been regarded as a symbol of the end of annual waterway repair, as well as the beginning of spring and the farming season。