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One of the reasons tropical forests are being cut down so rapidly is demand for the hardwoods that grow there. Hardwoods, as the
One of the reasons tropical forests are being cut down so rapidly is demand for the hardwoods that grow there. Hardwoods, as the
admin
2013-07-11
43
问题
One of the reasons tropical forests are being cut down so rapidly is demand for the hardwoods that grow there. Hardwoods, as their【C1】______suggests, tend to be denser and more durable than softwoods. But their unsustainable logging【C2】______not only forests but also【C3】______creatures and the future prospects of the people who lived there.
It would be better to【C4】______softwood, which grows in cooler regions in【C5】______managed forests. Softwoods are fast-growing species that【C6】______80% of the world’s timber. But the stuff is not durable enough to be used outdoors【C7】______being treated with poisonous chemicals to protect it【C8】______insect pests. These chemicals eventually【C9】______out into streams and rivers, and the wood must be retreated. 【C10】______, at the end of its life, wood that has been treated with such kind of chemicals in this way needs to be disposed of【C11】______.
One way out of this problem would be an environmentally【C12】______way of making softwood harder and more durable—something that a Norwegian company called Kebony has now【C13】______.
Kebony stops wood from rotting【C14】______placing in a large container containing a 【C15】______called furfuryl alcohol(糖醇), which is【C16】______from the waste left over when sugarcane(甘蔗)is processed. The container is then pressurised, 【C17】______the liquid into the wood. Next the wood is dried and heated to 110℃, which makes the cell walls of the wood thicker and【C18】______.
Of course, treating wood makes it more【C19】______. But because it does not need to receive【C20】______treatments, it should prove economical over its lifetime.
【C6】
选项
A、add to
B、make of
C、account for
D、take to
答案
C
解析
考查短语识别。此空后面是一个百分比的数字80%,选account for“(在数量、比例上)占”。add to“增加”,一般是指增加了某些东西;make of“用……制成”和take to“喜欢,开始从事”意思不符。
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0
大学英语四级
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