首页
登录
职称英语
[originaltext] To extinguish different kinds of fires, several types of fire
[originaltext] To extinguish different kinds of fires, several types of fire
游客
2023-08-02
66
管理
问题
To extinguish different kinds of fires, several types of fire extinguishers have been invented. They must be ready for immediate use when fire breaks out. Most portable kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers.
Since fuel, oxygen and heat must be present in order for fire to exist, one or more of these things must be removed or reduced to extinguish a fire. If the heat is reduced by cooling the material below a certain temperature, the fire goes out. The cooling method is the most common way to put out a fire. Water is the best cooling material because it is low in cost and easy to get.
Another method of extinguishing fire is by cutting off the oxygen. This is usually done by covering the fire with sand, steam or some other things. A blanket may be used to cover a small fire.
A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel.
The method that is used to put out a fire depends upon the type of fire. Fires have been grouped in three classes. Fires in wood, paper, cloth and the like are called Class A fires. These materials usually help keep the fire on. Such fires can be stopped most readily by cooling with water.
选项
A、Wheal it breaks out.
B、How it comes about.
C、What kind it is.
D、Where it takes place.
答案
C
解析
What should we first be clear about in choosing how to put out a fire?
转载请注明原文地址:https://tihaiku.com/zcyy/2890955.html
相关试题推荐
[originaltext]Hello,everyone.Wewilltalkaboutthetechnologytoday.You
[originaltext]Hello,everyone.Wewilltalkaboutthetechnologytoday.You
[originaltext]Hello,everyone.Wewilltalkaboutthetechnologytoday.You
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Moderator:Goodevening,ladiesandgentlemen.It’smygr
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]W:Hi,Jim.Whatareyoudoing?M:Oh,hi,Linda.I’mworkingon
随机试题
Asummaryofthephysicalandchemicalnatureoflifemustbegin,notonth
Whatisthemostpopularfoodinwesterncountries?Ifyouarenotsure,sta
WhichofthefollowingisCORRECTaccordingtothenewsitem?[originaltext]
MeaninginLiteratureI.AUTHOR—Interpretauthor’sintendedmeaningbya)Readi
血沉使用的抗凝剂是( )。A.乙二胺四乙酸(EDTA)盐 B.双草酸盐 C
穿好手术衣后,手应该放置的正确位置是A:上举至双肩以上,下垂至腹部 B:上举至
下列哪种行为违反《中华人民共和国水污染防治法》的规定?( )A.向水体排放、倾
2010年9月9日甲创作完成小说《坚硬的泡沫》,2012年5月
《卓越绩效评价准则》评分系统中,( )是条目要求中最重要的特征,是针对条目的核
线下工程竣工测量线路中线桩高程应利用()控制点进行测量。A.CP0 B.CP
最新回复
(
0
)