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, kerosene, home heating oil, residual fuel oil, and lubricating oils, come from one source-
Petroleum products, such as gasoline, kerosene, home heating oil, residual fuel oil, and lubricating oils, come from one source-
admin
2012-08-10
33
问题
Petroleum products, such as gasoline, kerosene, home heating oil, residual fuel oil, and lubricating oils, come from one source-crude oil found below the earth’s【S1】______, 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【S2】______. Sometimes crude oil is secured by drilling a hole through the earth, but more dry holes are drilled than those producing oils. Pressure at the source or pumping【S3】______crude oil to the surface.
Crude oil wells flow at varying rate, from ten to thousands of barrel per hour. Petroleum【S4】______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【S5】______of only two elements: carbon and hydrogen, which form compounds called hydrocarbons. Other chemical elements【S6】______in union with the hydrocarbons are few and reclassified as impurities. Trace elements are also found, but these are of such minute quantities that they are disregarded. The【S7】______of carbon and hydrogen forms many thousands of compounds which are possible because of the various positions and joining of these two atoms in the hydrocarbon molecule.
The various petroleum products are【S8】______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【S9】______or residual fuel oil and is used mostly for burning under boilers. Additional complicated refining processes rearrange the chemical structure of the hydrocarbon to produce other products, some of which are used to【S10】______and increase the octane rating of various types of gasoline.
A) degrade B) refined C) up D) light
E) products F) into G) surface H) heavy
I) forces J) combination K) exterior L) found
M) upgrade N) made O) interior
【S8】
选项
答案
B
解析
根据句子结构,此处应填一过去分词构成被动结构。符合该结构的有refined和made。be made from的意思是“由……构成”,be refined from的意思是“从……提炼出”,符合句意的只有refined。本句意为:各种汽油产品都是通过加热和压缩原油中的水蒸气精炼而成。
转载请注明原文地址:https://jikaoti.com/ti/tEcFFFFM
0
大学英语四级
相关试题推荐
AndrewCarnegie,knownastheKingofSteel,builtthesteelindustryintheUnitedStates,and,intheprocess,becameoneoft
Recently,thenewshasbeenfilledwithreportsofthe"birdflu."Asiaisonaregion-widehealthaleft,withgovernmentsslaug
Childrenlearnalmostnothingfromtelevision,andthemoretheywatchthelesstheyremember.Theyregardtelevisionpurely【C1】
HistorianstendtotellthesamejokewhentheyaredescribinghistoryeducationinAmerica.It’stheone【C1】______theteachers
Careerplanningdoesnotnecessarilyfollowroutineorlogicalsteps.Eachofusplacesweightondifferentfactorsandmaycons
ThefearofFridaythe13thstemsfromtwoseparatefears--thefearofthenumber13andthefearofFridays.Bothfearshavede
A、Therewasatrafficaccident.B、Acarwassmashedbyafallingobject.C、Acarhitsomeonenearthehighbuilding.D、Adriver
Katerefusedto______thecarkeystoherhusbanduntilhehadpromisedtowearhissafetybelt.
A、Healthyfood.B、Effectivemedicine.C、Howtoreduceweight.D、Howtodoexercise.C选项的概括性很强表明,本题考查对话话题。女士首先说明自己因为减肥减不下来感到绝望,男士
A、Examplesandconclusions.B、Evidenceandargument.C、Storiesandexplanation.D、Factsanddescriptions.D短文开头作者提出问题:什么样的动物重五吨,
随机试题
社会主义职业道德的基本要求是()。
当代大学生承担的历史使命是()
患者,女,63岁,头痛且空,眩晕耳鸣,头面烘热,面颊红赤,时伴汗出,腰膝酸软,神疲乏力,舌红少苔,脉弦细无力。根据患者症状,其辨证为
采用全站仪进行水平距离测量,主要应用于()。
西方国家的货币政策工具包括()。
处罚法能消除不良行为,强化法能培养新的适应行为。因此,两者结合使用会更有效。()
A信息系统集成公司有员工50多名,其中技术部开发人员有30多人。公司采用矩阵式的组织结构。公司的主营业务是开发企业信息化建设方面的项目,业务较为繁忙,一般有十多个项目在同时进行。由于技术人员有限,为保证各个项目的进展,人员在项目间的兼职与交叉很严重。一个技
Withinminutesafterthelittlemonkeyisputintoasmallsteelcage,thefrightinitslittlebrowneyessoftensinto______.
Money—whatafascinatingsubject!Thereismoneyinthephysicalsense;coins,papermoney,chequesandplasticcreditcards.Th
A、Onceaweek.B、Twiceaweek.C、Threetimesaweek.D、Fourtimesaweek.C
最新回复
(
0
)