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【单选题】
Which of the following, if true, would most weaken the argument of the critics of the Kyoto Protocol that implementing the protocol would be too costly?A.
While it is true that the scientific community is not unanimously in agreement that global warming is occurring, more than 95 percent of climatologists at universities and government-funded laboratories in Europe and North America agree that global warmin
B.
Hybrid fuel-cell cars are less expensive to operate than conventional cars because of their much greater fuel efficiency, but it is unlikely that these operational savings will ever be able to cost-justify the much greater initial investment required to p
C.
Nuclear power, although completely flee of carbon emissions and comparable in operating cost to an oil-burning power plant, brings the added back-end cost of disposing of the spent nuclear waste, which is both radioactive and highly toxic.
D.
Although it is unfair in a sense to impose different emissions restrictions on different countries, it is only fair to impose the most restrictive limitations on countries whose advanced economic development will allow them to conform. to the regulations w
E.
One nation that switched the fuel of 35 percent of its power plants from coal to natural gas in order to reduce carbon dioxide emissions found that natural gas, although initially more expensive than coal, dropped in price to a level comparable to that of
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【单选题】解放战争时期，中国共产党领导的第二条战线是指()
A.
解放区的土地改革运动
B.
中国人民解放军的战略进攻
C.
国民党统治区以学生运动为先导的人民运动
D.
各民主党派和无党派民主人士反对国民党独裁统治的斗争
【简答题】分子里由( )和( )相连而构成的化合物叫醛,通式( )。其中甲醛结构简式( ),它俗称( ),35%-40%()的甲醛水溶液叫做( )。
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