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
39
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
【S6】
选项
答案
L
解析
此句的主干为“other chemical elements are few and reclassified as impurities”。由此可见,其他成分为修饰成分,很明显,此处是一个分词结构充当名词的后置定语。符合该结构的只有refined和found,又根据题意,只有found最符合句意。本句意为:人们发现和碳氢化合物混杂在一起的其他化学成分很少,于是把它们重新归类为杂质。
转载请注明原文地址:https://jikaoti.com/ti/lEcFFFFM
0
大学英语四级
相关试题推荐
OneofthemostpopularmythsabouttheUnitedStatesinthe19thcenturywasthatofthefreeandsimplelifeofthefarmer.It
Forthispart,youareallowed30minutestowriteanessayaboutCross-CampusSelectiveCourses.Youshouldwriteatleast120
AdetailedandthoroughresearchprojectundertakenbytheOpenUniversityrecentlyreportedthattheirevidenceappearstoshow
AdetailedandthoroughresearchprojectundertakenbytheOpenUniversityrecentlyreportedthattheirevidenceappearstoshow
Forthispart,youareallowed30minutestowriteashortessayonthetopicofstudentsselectingtheirlecturers.Youshould
A、Themanshouldgotothedepartmentoffice.B、Themanhastofollowthecorrectprocedure.C、Themancandropanycourseashe
Theyalsofinditdifficulttobepleasedbycomplimentsbecausetheybelievetheyare_____________(不值得称赞).
Thismedicalteam______2specialistsappointedbytheMinisterand3doctorsandtwoheadnurses.
Hesaid______thattheyhadbeenobligedtogiveuptheschemeforlackofsupport.
A、Sheisreallyfat.B、Sheisonadiet.C、Sheisslimallthetime.D、Shelostalotofweight.D推理判断题。女士问男士有没有注意到Jane的变化,男士表示自
随机试题
肺胀痰浊壅肺证的治法是
我国国民经济和社会发展系统中最重要的一对关系是()。
无风险利率与期权的价值呈正相关关系。()
某企业2005年末现金余额为10万元;2005年实现销售收入1000万元,2006年预计销售收入1500万元,该公司每年实现的销售收入在当年收现60%,第二年收现40%,2006年预计其他现金收入80万元;2005年末应付账款余额120万元,2006年预
下列各项,会影响企业资本公积总额的有()。
东林公司是一家民营高科技企业,专门研发、生产和销售户外LED屏幕。经过多年的发展,公司产品在本省占有率达到40%,控股子公司有8个,总经理由职业经理人担任。公司的实际控制人张某深感内部控制制度的建立健全对公司可持续发展的重要性。公司给办公大楼都安装了24小
被苏轼赞为“诗中有画,画中有诗”的唐代诗人是()。
根据下列资料,回答问题。2014年3月,全国居民消费价格总水平同比上涨2.4%,其中,城市上涨2.5%,农村上涨2.1%,食品价格上涨4.1%,非食品价格上涨1.5%。消费品价格上涨2.2%,服务价格上涨2.81%。1—3月平均,全国居民消费价格
作风建设的核心是()
关于派生类的说法,不正确的是()。
最新回复
(
0
)