题目内容
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[单选题]
I believe reserves of coal here are _________ to last for fifty years.
A.sufficient
B.efficient
C.persistent
D.rich
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题目内容
（请给出正确答案）
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题目内容
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A.sufficient
B.efficient
C.persistent
D.rich
如果结果不匹配，请 联系老师 获取答案
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听力原文：A: This is the Pan-American Club. May I help you？
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听力原文： That's how Shown O'Neill looks back on the heart attack he experienced shortly after his 31st birthday.
"I thought I was in perfect health," Shown says. "I was never sick. I woke up feeling good every morning."
Then on that fateful day in April 2002, he received a giant eye opener. He was working in his yard in Hixson and started having pain in his chest and arms. "I wag pretty sure what it was, but I couldn't believe it could be happening to roe." The good news is that because Shawn recognized the symptoms and went immediately to Memorial Noah Park Hospital, he received the treatment he needed and the damage to his heart muscle was minimal.
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A) phenomena
B) priority
C) preference
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F) dominant
G) attributes
H) assets
I) evolution
J) commenced
K) advanced
L) scatters
M) sheds
N) exist
O) survive
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A) expect B) administrative C) returned D) recycled E) dependent
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A．over and over
B．unconscious
C．unreliable
D．incredible
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Too Little for Global Warming
Oil and gas will run out too fast for doomsday global warming scenarios to materialize, according to a controversial new analysis presented this week at the University of Uppsala in Sweden. The authors warn that all the fuel will be burnt before there is enough carbon dioxide in the atmosphere to realize predictions of melting ice caps and searing temperatures. Defending their predictions, scientists from the Intergovernmental Panel on Climate Change say they considered a range of estimates of oil and gas reserves, and point out that coal-burning could easily make up the shortfall. But all agree that burning coal would be even worse for the planet.
The IPCC's predictions of global meltdown pushed forward the 1997 Kyoto Protocol, an agreement obliging signatory nations to cut CO2 emissions. The IPCC considered a range of future scenarios, from unlimited burning of fossil-fuels to a fast transition towards greener energy sources. But geologists Anders Sivertsson, Kjell Aleklett and Colin Campbell of Uppsala University say there is not enough oil and gas left even the most conservative of the 40 IPCC scenarios to come to pass.
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Nebojsa Nakicenovic, an energy economist at the University of Vienna, Austria who headed the 80-strong IPCC team that produced the forecasts, says the panel's work still stands. He says they factored in a much broader and internationally accepted range of oil and gas estimates than the "conservative" Swedes.
Even if oil and gas run out, "there's a huge amount of coal underground that could be exploited", he says that burning coal could make the IPCC scenarios come true, but points out that such a switch would be disastrous. Coal is dirtier than oil and gas and produces more CO2 for each unit of energy, as well as releasing large amounts of particulates. He says the latest analysis is a "shot across the bows" for policy makers.
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A．The coal reserves are big enough.
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D．Oil and gas will run out so fast that Earth's doomsday will never materialize.
