单项选择题

According to the author, energy security can only be achieved by ______.

A．using less oil in power generation
B．replacing fossil fuels with more nuclear power
C．seeking energy self sufficiency
D．expanding the sources of power supply

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单项选择题

To solve the present social problems the author suggests that we should ______.

A．enable man to fully develop his potentialities
B．offer higher wages to the workers and employees
C．resort to the production mode of our ancestors
D．take the fundamental realities for granted