单项选择题

A．Build big lakes to store water.
B．Construct big pumping stations.
C．Build small and cheap irrigation systems.
D．Channel water from nearby rivers to crop land.
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单项选择题
A．Be reduced to the minimum.B．Stimulate domestic demand.C．Reflect its real value.D．Take into account the occurrences of droughts.
A．Be reduced to the minimum.
B．Stimulate domestic demand.
C．Reflect its real value.
D．Take into account the occurrences of droughts.
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