反应C（s）+O2（g）→CO2（g）的∆rHm＜0，欲增加正反应速率，下列措施中无用的是（）。

A:增加氧的分压 B:升温 C:使用催化剂 D:减少CO2的分压

使用CO2培养箱时，应注意（）。

A:组织培养皿需放在塑料盘内进行孵育 B:培养瓶和碟不能叠放，要分类存放 C:定期清洁和消毒 D:专人管理，每天检查CO2、管道，防止漏气，检查温度等

采用瓦斯分析仪，气体分析中，CO，CO2、O2的吸收顺序是（）。

A:CO、CO2，O2； B:CO2、O2、CO； C:O2、CO、CO2； D:O2、CO2、CO。

CO2比空气（）。

A:轻 B:重 C:一样重

天然水中CO2的主要来源有（）。

A:空气中CO2溶解 B:有机物的氧化分解 C:降水夹带 D:地层深处的化学反应变化

测量CO2和CH4的红外线气体分析器，若测量浓度的上限相同，则其测量气室的长度（）。

A:亦相同 B:不相同，测量CH4的气室要长些 C:不相同，测量CO2的气室要长些[T/] D:以上都不对

目前排放到空气中的CO2逐年增加，对此最担心的是（）

A:会使空气中的氧气含量下降，不足以供人类呼吸 B:会使地球温度升高，冰川融化，生态失衡 C:会使人体吸进大量CO2损害健康 D:会使石灰岩大量溶解，破坏自然风光

关于CO2运输的叙述。正确的是

A:化学结合的CO2 主要是碳酸氢盐和氨基甲酸血红蛋白 B:与Hb的氨基结合生成氨基甲酸血红蛋白的反应需酶的催化，速度较慢 C:从组织扩散进入血液的大部分CO2 ，在血浆内与水反应生成H2 CO3 D:血浆内含有较高浓度的碳酸酐酶 E:氨基甲酸血红蛋白形式运输CO2最为重要

KF、Cl2、CO2三种分子它们的化学键不同，（）。

A:KF属离子键，Cl2属非极性共价键、CO2属极性共价键 B:KF属极性共价键，Cl2、CO2均属非极性共价键 C:KF属离子键，Cl2、CO2均属非极性共价键 D:KF属离子键，Cl2、CO2均属极性共价键

第二篇： Around 45% of the UK’s carbon dioxide emissions come from the energy people use every----at home and when they travel . In order to generate that energy, fossil fuels (coal oil, and gas) are burnt, and these produce greenhouse gases--- in particular carbon dioxide (CO2) a year, and it is the same CO2 that is changing the climate and damaging the environment. CO2 and various other gases wrap the earth in an invisible blanket helping to prevent heat from escaping. Without this greenhouse effect, the average temperature on Earth would be around -18℃, compared with the current average of around +15℃. The composition of this blanket of gases has remained relatively constant for many thousands of years. However, since the industrial revolution began around 200 years ago, people have been burning increasing amounts of fossil fuels, thus releasing more CO2 and other greenhouse gases in the process. This has increased the heating effect of the blanket, trapping more of the sun’s energy inside the Earth’s atmosphere in turn the Earth’s temperature has increased more rapidly in a shorter pennd of there that it has for thousands of years. 　　In 2008, the total UK CO2 emissions were 533 million tones 27% (144 million tonnes ) of those emissions came from the energy used to heat, light, and power homes. Transport emissions caused by passenger cars, buses and motorcycles accounted for a further 16% (87 million tonnes ) of the UK’s CO2 emissions. These figures show that a significant amount of CO2 results from ordinary citizens’ carbon footprint in their daily activities and lifestyle. 　　The effects of climate change can be seen all around us. Weather patterns are cecoming more and more fractured and uncertain, and over the last century trends in warm weather have become increasingly common. In the UK in the last 40 years, winters have grown warmer with much heavier rainfall. One of the clearest shifts over the last 200 years is towards summers that are hotter and drier, causing pervasive water shortages. Recent years have been the hottest since records began and during August 2003 the hottest outdoor temperature in the UK was recorded ---38.5. What is the author’s opinion about the level of CO2 emissions in the UK?

A:The majority of CO2 emissions come from motorized transport. B:CO2 emissions may cause climate change in the future C:More CO2 emissions come from homes than from cars D:The average citizen does not create much CO2