Using solar energy can help save our precious fuel.As you know, our supplies of oil and gas are very limited.There is just not enough on hand to meet all our future energy needs when Mother Nature says that's all.The only way we can delay hearing those words is by starting to save energy now and by using other sources,like the sun.
We won't have to worry about the suns running out of energy for another several billion years or so.Besides being an endless source of energy, the use of the sun has other advantages as well.(34)The sun doesn't offer as many problems as other energy sources.For example,fossil fuel plants add to already high pollution levels.With solar energy, we will still need sources of energy, but we won't need as much.That means we can cut down on our pollution problems.
Solar coats are starting to equal the costs of oil and electricity.Experts say that gas,oil and electricity prices will continue to rise.The demand for electricity is increasing rapidly.But new power plants will use more gas,oil or coal.Already in some places the supply of electricity is being rationed.(35)Solar energy is now in its infancy.It could soon grow to become a major part of our nations energy supply.
(30)
A.There are many factors which can influence the use of solar energy.
B.No matter where you live,you can use solar energy freely.
C.All the houses can be equipped with solar energy system.
D.Only the whole country can afford to use solar energy.
第6题
中毒型细菌性痢疾(休克型)的主要表现是
A、高热
B、脓血便
C、惊厥
D、循环衰竭
E、呼吸衰竭
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