单项选择题

The oscillating water column produces power from ______.

A．the turbine that powers the generator
B．the generator that produces electricity
C．the cylinders that drives the turbine
D．the air that escapes from the turbine

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热门试题

单项选择题

The use of water referred in this passage is ______.

A．a new concept compared with other ways of natural resources
B．less expensive than petroleum and other means of energies
C．now being used more from the ocean than from rivers and lakes
D．being developed to supplement other sources of energy

单项选择题

The development of oceanic water power is important to America because ______.

A．there is a severe shortage of coal and petroleum
B．it is the cheapest method of producing energy
C．petroleum supplies are being steadily drained
D．obtaining energy from ocean water are simpler