更多"The reason why all the solar energy"的相关试题:
[单项选择]Solar energy causes
A. less pollution than oil
B. the same pollution as oil
C. more pollution than oil
D. financial problem
[单项选择]It can be inferred that in promoting solar energy the US government ______.
A. admits its limitation of being expensive
B. rarely mentions its cost to homeowners
C. stands on the side of the majority of consumers
D. remains more objective than the solar equipment manufacturers
[单项选择]Which of the following is NOT TRUE of solar energy
A. The technical problem of providing heat on cloudy days are not yet solved.
B. It costs much to have a solar energy system installed at home.
C. There are basically two types of solar energy.
D. Solar energy is clean, inexhaustible and free of risk.
[单项选择]Why are subterranean buildings good for energy conservation
[单项选择]According to the second theory, why did the solar system clear everywhere except in the asteroid belt
A. The asteroid belt was too far away from the sun.
B. In the asteroid belt, the gravity of Jupiter was strong enough to balance the opposing pull of the sun.
C. The solar system prevented fragments from accreting into their own planets.
D. The asteroids are leftovers from the days of creation.
[单项选择]What is the energy source of this so-called solar-sail vehicle
A. Sunlight.
B. Nuclear.
C. Wind.
D. Electricity.
[单项选择]Why does Canada depend less on nuclear energy than European countries Because ______.
A. it has not yet obtained the nuclear technology
B. the Canadians are strongly against the use of nuclear power
C. it has large coal reserves
D. it relies on the U.S. [or supply of electricity
[单项选择]Why would a terrorist go to the Atomic Energy commission's public reading room
A. To find out how to design a bomb.
B. To find out where to steal plutonium.
C. To look at files of secret information.
D. To find out where to steal an atomic bomb.
[单项选择]It amazes me that she's got the energy for all those parties.
A. terrifies
B. frightens
C. amuses
D. surprises
[单项选择]All the planets in the Solar system except Mercury and Venus have natural satellites, — objects that revolve around the planets.
A. ( which
B. ( which are
C. ( of which
D. ( and which
[单项选择]Why can all the astronauts sleep at the same time
A. They have to follow the same timetable.
B. The radio will take care of the aircraft for them.
C. There are enough sleeping bags in the spacecraft.
D. There is no need for them to watch over the spacecraft.
[单项选择]
Passage Three All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood. Coal, oil, natural gas, and all other fuels are stored-up energy from the sun. Some was collect ed by this season’s plants as carbon compounds. Some was stored by plants and trees ages ago. Even waterpower derives from the sun. Water turned into vapor by the sun falls as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun’ s outer layers, and much of this energy that is directed toward the earth never arrives. About nine-tenths of it is absorbed by the atmosphere of the earth. In fact; the earth itself gets only one half-billionth of the sun’ s entire output of radiant energy.
All the useful energy at the surface of the earth comes （）
A. directly from the sun
B. from the sun' s activity
C. from energy stored by the sun
D. from radiation of the sun
