【单选题】下列关于燃烧污染物的生成机理说法错误的是( )。
A.
固体燃料燃烧所产生的烟尘主要来自燃料所含的灰分
B.
液体燃料的灰分含量很少,一般为0.1%~0.4%
C.
固体燃料煤中的硫以有机硫和无机硫形态存在,还有极少量的单质硫
D.
燃料燃烧时NOx产生的途径之一是燃烧时空气中的氮在较低温度下被氧化而生成氮氧化物,称为温度型NOx
【简答题】煤在燃烧时会产生许多污染物,为了减少煤燃烧时对环境的污染,将水蒸气通过炽热的煤层可制得较洁净的水煤气(主要成分是CO和H 2 ),产生水煤气的化学方程式为______.生产煤气的工厂常向家用煤气中特意掺入少量有难闻气味的气体,其目的是______.
【单选题】Everyone needs a balance of cooling yin and hot yang to be ______. [ ]
【简答题】EVERYONE NEEDS FRIENDS Everyone needs friends.We all like to feel close to someone.It is nice to have a friend to talk,laugh and do things with.Surely,there are times when we need to be alone.We don’t...
【单选题】Everyone sometimes needs to feel good about ________. [ ]
【简答题】Everyone needs to sleep. This is a fact of life that everyone has to deal with and that they get plenty of it. Your body needs time to get back the energy that you during the whole day. This usually h...
【简答题】煤燃烧时产生的主要污染物是( )。 A氮的氧化物 B二氧化硫 C二氧化碳 D一氧化碳