光能利用率(efficiency for solar energy utilization)
Which of the following titles is closest to the message the text tries to convey?
A.Renewable Energy
B.A heavy Blow for Solar Energy
C.Environment and Solar Energy
D.Do We Need Solar Energy?
It is known that solar power can ______ electric energy.
A.convert into
B.convert to
C.be converted into
D.be converted to
A.When
B.If
C.Now that
D.Just as
A、Olympus Mons
B、Mount Everst
C、Mons Huygens
D、Vinson Massif
A.changed
B.altered
C.transformed
D.modified
According to the author, once on Mars, astronauts, geologists and biologists
A.could not make any remarkable discovery.
B.could only analyze the rocks there in detail.
C.could not find the mysteries of life in solar system.
D.could well understand the operation of the whole solar system.
From the passage, we can conclude that ______.
A.it will be impossible for wind and solar energy to completely replace fossil fuels
B.high technology plays a vital role in the trend toward clean energy
C.the 'development of a nation will inevitably pollute the environment
D.poor areas are badly polluted and are in high need of renewable energy
This passage centers mainly on ______ .
A.harnessing energy through chemistry
B.our last source of power
C.how water power is produced
D.the amount of solar energy that can be utilized