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【单选题】
Britains emissions of greenhouse gases, blamed by many scientists for contributing to global warming, have fallen by 14 percent since 1990, according to the latest government report. British lakes and rivers are also on the road to recovery from acid rain poisoning, following successful curbs to air pollution from cars and heavy industry. The report by the National Atmospheric Emissions Inventory (NAEI) attributed the drop in greenhouse gas emissions to several factors including: the introduction of catalytic converters on cars, a move toward low sulphur and lead-free petrol and a switch to gas from coal and oil in power generation. Environment Minister Michael Meacher said the downward trend was welcome, but warned of complacency. 'Even though these figures are encouraging, we must not be complacent There are still significant problems where we need to do more, for example, to further reduce greenhouse gases and harmful pollutants (污染物) such as ammonia and particulate matter,' he said in a statement. The government has a target to cut greenhouse gases by 23 percent by 2010 on 1990 levels. This is almost double the target of 12. 5 percent to which the UK is committed under the Kyoto Protocol and there are signs that emissions are rising as generators return to using coal-fired power stations in the face of rising natural gas prices. The Department of Environment Food and Rural Affairs (DEFRA) said substantial curbs on sulphur dioxide emissions across the UK and Europe had cut acid rain by half over the last 12 years. 'Damaged freshwater lakes and streams are showing signs of recovery,' it said. But DEFRA warned of a new threat: 'Nitrogen oxides and ammonia are the main air pollutants that must be tackled to stop future damage. ' The bulk of Britains ammonia emissions come from farm animal manure (粪肥), causing over-enrichment of land and waterways, said the report. Certain species rampage unchecked through this ultra-fertile environment, smothering the slower growing plants beneath them and choking streams and rivers. Nitrogen oxides enter the atmosphere from car exhausts and industry, creating health-damaging ozone and contributing to acid rain. According to the passage, Britain has achieved success in all of the following EXCEPT
A.
reducing emissions of greenhouse gases
B.
recovering lakes and rivers from pollution
C.
preventing acid rain from falling
D.
curbing air pollution from cars and heavy industry
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【多选题】如何评价和单选改革的成败与是非得失,明确提出了“三个有利于”的标准。“三个有利于”标准是指(  )
A.
是否有利于实现共同富裕
B.
是否有利于发展社会主义社会的生产力
C.
是否有利于增强社会主义国家的综合国力
D.
是否有利于提高人民的生活水平
【单选题】直流电动机工作时,其电枢绕组中的电动势是()。
A.
交流电动势
B.
直流电动势
C.
恒定方向的电动势
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A.
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A.
外购的商标权    
B.
市场份额
C.
土地使用权    
D.
非专利技术
【简答题】右手螺旋定则可以用于已知电流方向来判断() A.电磁力的方向 B.电流所产生的磁场方向 C.电动势方向
【单选题】销售无形资产是指转让无形资产所有权或者使用权的业务活动,下列不属于无形资产的有( )
A.
技术
B.
商标
C.
著作权
D.
建筑物产权
【单选题】( )我国的国体即国家性质是
A.
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B.
执政
C.
人民代表大会制度
D.
人民民主
【判断题】(............)电动势的方向和电压方向是一致的。
A.
正确
B.
错误
【单选题】下列不属于无形资产特征的是
A.
不具有实物形态
B.
拥有或控制
C.
非货币性长期资产
D.
可辨认性
【单选题】()电动势的方向规定为。
A.
由低电位指向高电位
B.
由高电位指向低电位
C.
电位的方向
D.
电位的大小
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