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Underground Coal Fires Coal burning deep underground in China, India and ...
Underground Coal Fires Coal burning deep underground in China, India and ...
admin
2020-12-24
43
问题
Underground Coal Fires
Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large scale___________ (51) blazes (火焰)cause the ground temperature to heat up and kill surrounding vegetation,produce greenhouse gases and can___________ (52) ignite (点燃)forest fires,a group of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting___________ (53) of poisonous elements like mercury can also pollute local water sources and soils, they warned.
“Coal fires are a global disaster,” said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, USA. But____________ (54) few people know about them.
Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to___________ (55) and, under the right combinations of sunlight and oxygen,can trigger spontaneous (自发的)catching fire and burning. This can occur underground,in coal stockpiles,abandoned mines or even as coal is transported. ___________ (56) fires in China consume up to 200 million tons of coal per year, delegates were told. In___________ (57),the U. S. economy consumes about one billion tons of coal annually, said Stracher,____________ (58) analysis of the likely impact of coal fires has been accepted for publication in the International Journal of Coal Ecology .____________ (59) underway, coal fires can burn for decades, even centuries. In the process,they release large___________ (60) of greenhouse gases, poisonous fumes and black particles into the atmosphere.
The members of the panel discussed the____________ (61) these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to___________ (62).
Ultimately, the remote sensing and other techniques should allow scientists to___________ (63) how much carbon dioxide these fires are emitting (释放).One suggested___________ (64) of containing the fires was presented by Gary Colaizzi, of the engineering firm Goodson,which has developed a heat-resistant grout (灌浆),which is designed to be pumped into the coal fire to____________ (65) the oxygen supply.
选项
A house
B sky
C water
D underground
答案
D
解析
选项D的意思是“在地下”。文章提到煤的燃烧发生在地下,因此火焰也在地下便不难理解,故选D项。
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