下列关于空气中各组成分说法正确的是  A.空气中的O2只有点燃时才

下列关于空气中各组成分说法正确的是 

A.空气中的O2只有点燃时才能发生化学反应

B.空气中的CO2是导致酸雨的主要原因

C.空气中的N2没有任何使用价值

D.空气中的稀有气体充入灯泡中可使其耐用

答案

D

相关题目

Don and his 11-year-old son, Allen, love basketball very much. On Allen’s bir
Don and his 11-year-old son, Allen, love basketball very much. On Allen’s birthday, Don  21  to drive him to Chicago, more than two hours’ distance, for the first game of the World Championsh
若集合,则=          
若集合,则=          
There were many great artists during the Renaissance. Perhaps the most famous a
There were many great artists during the Renaissance. Perhaps the most famous are Leonardo da Vinci and Michelangelo. Other artists, however, also had great influence both during Renaissance times
下列说法正确的是 ······················· ( ▲
下列说法正确的是 ······················· ( ▲ )A.要了解一批灯泡的使用寿命,采用全面调查的方式B.要了解全市居民对环境的保护意
在下列图示中,正确表示血浆、组织液和淋巴三者之间关系
在下列图示中,正确表示血浆、组织液和淋巴三者之间关系的是 A.血浆       组织液        淋巴     B.血浆        组织液       淋巴
偏二甲肼与N2O4是常用的火箭推进剂,二者发生如下化学反应
偏二甲肼与N2O4是常用的火箭推进剂,二者发生如下化学反应: (CH3)2NNH2(l)+2N2O4(l)====2CO2(g)+3N2(g)+4H2O(g)                 (Ⅰ) (1)反应(Ⅰ)中氧化剂是
If you live in a big city, there are many things to drive you crazy on your dai
If you live in a big city, there are many things to drive you crazy on your daily route, and it’s not just overcrowded subway trains. Vicky Zhao is a mainlander working in Hong Kong. For her, one
《出师表》选段(15分) 臣本布衣,躬耕于南阳,苟全性命
《出师表》选段(15分) 臣本布衣,躬耕于南阳,苟全性命于乱世,不求闻达于诸侯。先帝不以臣卑鄙,猥自枉屈,三顾臣于草庐之中,咨臣以当世之

最新题目