单项选择题

A．Find some drift wood.
B．Take some photographs.
C．Solve a mystery.
D．See the canyon.
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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.
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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