首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Petroleum products,such as gasoline,kerosine,home heating oil,residual fuel oil,and lubricating oils, come from one source-crude
Petroleum products,such as gasoline,kerosine,home heating oil,residual fuel oil,and lubricating oils, come from one source-crude
admin
2015-01-09
61
问题
Petroleum products,such as gasoline,kerosine,home heating oil,residual fuel oil,and lubricating oils, come from one source-crude oil found below the earth’s surface,as well as under large bodies of water, from a few hundred feet below the surface to as deep as 25,000 feet into the earth’s interior. Sometimes crude oil is secured by drilling a bole through the earth,but more dry boles are drilled than those producing oil. Pressure at the source or pumping forces crude oil to the surface.
Crude oil wells flow at varying rates,from ten to thousands of barrels per hour. Petroleum products are always measured in 42-gallon barrels.
Petroleum products vary greatly in physical appearance:thin,thick,transparent or opaque,but regardless, their chemical composition is made up of only two elements:carbon and hydrogen,which form compounds called hydrocarbons. Other chemical elements found in union with the hydrocarbons are few and are classified as impurities. Trace elements are also found,but these are of such minute quantities that they are disregarded. The combination of carbon and hydrogen forms many thousands of compounds which are possible because of the various positions and joinings of these two atoms in the hydrocarbon molecule.
The various petroleum products are refined from the crude oil by heating and condensing the vapors. These products are the so-called light oils,such as gasoline,kerosene,and distillate oil. The residue remaining after the light oils are distilled is known as heavy or residual fuel oil and is used mostly for bunting under boilers. Additional complicated refining processes rearrange the chemical structure or the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane(辛烷)rating of various types of gasoline.
Which of the following is NOT listed as a light oil?
选项
A、Distillate oil
B、Gasoline
C、Lubricating oil
D、Kerosine
答案
C
解析
文中第四段列举了“light oils”包含的内容有“gasoline,kerosene,and distillate oil”,选项C的“Lubricating oil”不包含在内。
转载请注明原文地址:https://kaotiyun.com/show/L2LO777K
0
考博英语
相关试题推荐
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【1】hebelievedthatindividu
AlltherecentnewsonAIDSisbad.ThedeathofRockHudson【1】publicconcernaboutthe【2】almosttothepointofpanic.Nowgene
Themeetingwasputoffbecausewe______ameetingwithoutJohn.
Unlikemostsports,whichevolvedovertimefromstreetgames,basketballwasdesignedbyonemantosuitaparticularpurpose.
Today,theTowerofLondonisoneofthemostpopulartourist【1】andattractso-verthreemillionvisitorsayear.Itwasoccasio
In1906muchofSanFranciscowasdestroyedbyanearthquakeandthefiresthat
Mostpeoplewouldbe【71】bythehighqualityofmedicine【72】tomostAmericans.Thereisalotofspecialization,agreatdealof【
Inthesimplestterms,amarketistheplacewheresellermeetsbuyertoexchangeproductsformoney.Traditionalmarketsstill
Asoneworkswithcolorinapracticalorexperimentalway,oneisimpressedbytwoapparentlyunrelatedfacts.Colorasseenis
Oneoftheexaminationquestions______mecompletelyandIcould’tanswerit.
随机试题
A.肾小球新月体形成B.部分肾小球节段性硬化C.大部分肾小球纤维化,小部分肾小球代偿肥大D.肾小球毛细血管壁弥漫性增厚弥漫性新月体性肾小球肾炎的病理特点是
某机场的机械师陆某对机场领导人员心怀不满,在某次为等待执行任务的一架波音747客机进行机械检修时,故意对飞机的发动机装置进行了破坏。但恰好这架飞机此次没有投入运营。在第二天运营前机械师陈某在对飞机进行检修时发现了故障并及时进行了排除。对陆某的行为如何认定?
社会工作者张莉对某社区的青少年群体进行了调研和分析,发现有一些青少年整天游手好闲,对生活没有明确的目标,特别是对就业形势缺乏了解,对职业生涯缺少规划。为此,张莉设计了一个“职业生涯规划”小组,招募了11名社区青少年。通过两个多月的小组活动,这批青少年的态度
《中华人民共和国会计法》赋予财政部门对会计行为的监督权,其他拥有法律赋予的对有关会计工作实施监督并对相关会计违法行为进行处罚职权的部门有()。
下面不属于《普通高中语文课程标准(实验)》中“评价的基本原则”的一项()。
【2015重庆云阳选】最早在大学里开设教育学课程的是()。
现代植物保护学科发展的总趋势是朝着微观、宏观两个方向发展,在宏观指导下同时进行微观研究,并将微观资料进行宏观分析和处理,不断发展病虫治理新理论和新技术。在宏观方面,应用生态学和系统工程学的原理和方法建立农业生态系统中病虫害监控决策体系;在微观方面,以分子生
根据下图,回答116-120题。全民所有制单位职工劳保福利费在B年用于医疗费用的支出比用于其他费用的支出多:
已知x满足不等式22x一10.2x+16≤0,则的最大值与最小值之差为
通常数据链路层交换的协议数据单元被称为
最新回复
(
0
)