单项选择题

A．Advantages of nuclear-generated electricity.
B．Nuclear-and-coal-generated electricity.
C．Nuclear-generated electricity becoming one of the basic props supporting the U. S. economy.
D．U. S. energy independence.
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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.
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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