查询词典 nitrogen dioxide

Carbon dioxide is like nitrogen in many ways, but if it is mixed with limewater, it causes the clear liquid to because milky, while nitrogen dose not. This is the test for carbon dioxide.

二氧化碳在许多方面类似于氮气，但如果它与石灰水混合，它就使清澈的液体变成乳状液，而氮气不能，由此可以鉴别热氧化碳。

Persistent pollution is still seen as a major problem in Beijing, with levels of nitrogen dioxide surpassing the World Health Organization's clean-air guidelines by 78%.

持续无法改善的污染状况仍被认为是北京面临的一大难题，大气中的二氧化氮含量比世界卫生组织认定的正常标准高出了78%。

Oxide to form nitrogen dioxide and oxygen.

应，形成二氧化氮和氧气。

The experiment obtains the noon peroxy free radical density approximately 11 pptv, the observation had discovered the free radical the density has the direct ratio with the ozonedensity but to have the inverse ratio with the nitrogen dioxide density.

实验测得中午过氧自由基的浓度约11pptv，观测发现自由基的浓度同臭氧浓度成正比而与二氧化氮浓度成反比。

Aromatic hydrocarbons could be selectively nitrated with nitrogen dioxide in the presence of MIPs. MIPs were characterized by means of modern analyses. And such successes stem from combination of factors involved in this type of heterogeneous catalysis.

采用现代分析方法对MIPs进行表征，并将MIPs在催化芳烃硝化反应中表现的催化活性和区域选择性与其结构相联系。

Each subject's average monthly sulfur dioxides, nitrogen dioxide, ozone, carbon monoxide, particulate matter with aerodynamic diameter of less than10μm (PM10) exposure estimates during pregnancy were caculated.

利用2000至2002年的空气品质监测资料，计算研究对象受孕前一个月至分娩期间不同时期的周遭空气中悬浮微粒、二氧化硫、二氧化氮、臭氧、及一氧化碳等污染物的暴露情形。

Huangqiao carbon dioxide gas field in North Jiangsu Basin have the following characteristics: deep gas fields are associated with shallow ones, marine gas fields are coupled with continental ones, and several gas reservoirs are combined. Carbon dioxide in Huangqiao area mainly comes from deep mantle, mixed with a little thermal metamorphism and a little organic carbon dioxide in shallow formation, and helium and nitrogen gas mainly come from mantle. There is a good time\|space matching relationship between carbon dioxide gas reservoirs and great rifts, magma and volcano activity, which forms the special carbon dioxide gas reservoir mode for Huangqiao. This mode has good sealing, trapping and preserving conditions, but its gas source differs from traditional hydrocarbon gas reservoirs.

苏北盆地黄桥CO2气田具有深部气田与浅部气田、海相气田与陆相气田匹配组合互成一体、多个气藏组合分布的特点，其CO2主要以深部幔源成因为主，浅层混有部分热变质成因和少量有机成因CO2，氦气和氮气主要为幔源成因，而且，黄桥地区CO2气藏的发育与深大断裂和岩浆火山活动具有很好的时空配置关系，形成了独特的&黄桥式&CO2气成藏模式，并具备良好的储盖圈保条件。

Such issues are drawing international concern, because Beijing's high levels of carbon monoxide and nitrogen dioxide could cause breathing problems for Olympic athletes.

这些问题引起了全球关注。由于北京空气中的一氧化碳和二氧化氮浓度很高，会给运动员的呼吸系统带来伤害。

Such issues are drawing international concern, because Beijing's high levels of carbon monoxide nitrogen dioxide could cause breathing problems for Olympic athletes.

这些问题引起了全球关注。由于 www.ddd§tt.com 北京空气中的一氧化碳和二氧化氮浓度很高，会给运动员的呼吸系统带来伤害。

Queen St, Khyber Pass, the Bell Reserve in Pakuranga and Westlake Girls High School in Takapuna were the worst hit by the invisible soot and nitrogen dioxide.

皇后大街、凯波帕斯大街、东区帕库朗加的贝尔保留绿地、北岸市塔卡普纳的西湖女子中学是受不可见的有毒空气悬浮物和二氧化氮最严重的地区。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。