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If the sun has enough【C1】______to warm and light the whole earth, it must have enough power to do other things,【C2】______. Can w
If the sun has enough【C1】______to warm and light the whole earth, it must have enough power to do other things,【C2】______. Can w
admin
2011-03-01
48
问题
If the sun has enough【C1】______to warm and light the whole earth, it must have enough power to do other things,【C2】______. Can we use the sun’s【C3】______energy to supply electricity, or at least to perform the function which electricity or other types of power usually perform? The answer is【C4】______.
For example, people have for many years been using the【C5】______heat of the sun to cook by solar【C6】______which have been built with several incurred【C7】______reflecting the sun and focusing the heat on the cooking element. This【C8】______can be used like a gas or electric stove; it is more expensive to make but it doesn’t need any【C9】______and so costs【C10】______to use. Another【C11】______of using solar energy is in house heating.
The【C12】______of energy we use most is electricity, and every day more is【C13】______. But electricity has to be made too, and to make it huge quantities of fuel is required -- oil, coal, gas and nowadays even uranium.
The question which【C14】______everyone today is: how long will these fuels【C15】______? Nobody knows it for sure,【C16】______most experts think it will soon be difficult to obtain sufficient electricity from these sources. It is possible that the sun can make a(n)【C17】______here, too.
Solar power has already been used to produce【C18】______heat. In Southern France a solar furnace has been built,【C19】______temperatures reach more than 3 000 centigrade. This furnace is not only used for experiment【C20】______, but could be used to produce steam for a power station.
【C2】
选项
A、as well
B、too
C、besides
D、either
答案
B
解析
考查副词用法。as well指“也,还”,可用在句末,但前面一般不用逗号与其他部分隔开too指“也”,用在句末,其前用逗号,符合本题;besides指“除了(...还有)”,用于句中;either用于否定句。
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