题干

下列化学反应中,属于化合反应的是(   )

A:甲烷+氧气 二氧化碳+水

B:氢气+氧气

C:石蜡+氧气 二氧化碳+水

D:碱式碳酸铜 氧化铜+二氧化碳+水

上一题 下一题 0.0难度 选择题 更新时间:2012-02-15 08:42:08

答案(点此获取答案解析)

B

同类题2

阅读理解

    As has been all too apparent in recent days at Balcombe, few issues cause greater concern than energy policy. Many village communities feel their countryside is being ruined by the power-producing machines of wind farms; yet they never take “ direct action”, even though the planning laws put them at a severe disadvantage. And the generous subsidies(财政补贴),which encourage the expansion of wind power, are not favorable to the village communities and set landowners in conflict with other residents.

    Those who disagree with the rapid expansion of wind farms state that the damage they cause is out of proportion to the benefits they bring, because their energy output cannot match that of the carbon-based power stations they are supposed to replace. Supporters insist that wind must be part of a mix of renewables, nuclear and carbon, and that the country is committed to meeting EU(European Union) targets for non-carbon energy generation.

    Against this background, the fact that there is an argument within the Government over whether to publish an official report on wind farms impact on the countryside becomes even more extraordinary. The two parties in the coalition government are in disagreement over what it should say.

    We have some advice for the two parties :publish the report ,and let the country be the judge. Even if it contains evidence that wind farms are harmful, it will hardly be a pleasant surprise to people who do not like them. Equally, supporters must argue their case by acknowledging the concerns and explaining why they are either misplaced or worthy of much attention.

    The suggestion that further negotiations are to take place to produce an “acceptable” report suggests that the politics of coalition government are doing the country harm in a certain way. Given the sensitivities involved ,all the information should be available so that people can reach their own conclusions, rather than being left with the suspicion that facts are being replaced by political beliefs.

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同类题4

【关注家乡 共绘蓝图】

材料一:“天地和合则美,万物和合则生,人人和合则善,社会和合则安,国家和合则强,世界和合则宁”。和合文化也是中华优秀传统文化的精髓,台州是和合文化的发源地之一,影响广泛而深远。2017年,台州将以“和合台州”民俗文化季、“书香台州”全民阅读季、“山海台州”书画艺术季、“大美台州”精品展演季等四大主题活动贯穿全年,让文化成为台州前行的力量。

材料二:台州市委市政府提出努力建设“制造之都”,以先进制造为方向,打造高新高端、智能智慧的产业高地,推动民营经济向高端制造攀升、向创新驱动转换、向全面开放迈进。2017年,台州市路桥区的“全国植保与清洗机械产业知名品牌创建示范区”(目前产品国内市场占有率达30%以上)和黄岩区的“全国塑料模具产业知名品牌创建示范区”(2016年产值达150亿元,约占全国模具总产值的十分之一)获得国家质检总局批准筹建,此前,我市已有温岭水泵产业集聚区成功或建,民营企业成为助增长的一支生力军。

材料三:表格2016年台州市城镇和农村居民人均收入及增长速度表


城镇居民人均可支配收入

农村居民人均可支配收入

总额

47162

23164

同比增长

9.0%

9.1%

注:我市的国内生产总值3842.81亿元,城乡居民收入增长率位居全省第三位(全省11个设区市)。