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
116
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.
According to the passage,all the following is true EXCEPT_____.
选项
A、crude oil is found below land and water
B、crude oil is always found a few hundred feet below the surface
C、pumping and pressure force crude oil to the surface
D、a variety of petroleum products is obtained from crude oil
答案
B
解析
文中第一段“from a few hundred feet below the surface to as deep as 25,000 feet into the earth’sinterior”指的是在表面以下几百英尺到地球内部25,000英尺的地方,但并不是说在表面以下几百英尺的地方就能找到。
转载请注明原文地址:https://kaotiyun.com/show/T2LO777K
0
考博英语
相关试题推荐
Peoplethinkingabouttheoriginoflanguageforthefirsttimeusuallyarriveattheconclusionthatitdevelopedgraduallyas
Thedifferencebetweenaliquidandagasisobvious【1】theconditionsoftemperatureandpressurecommonlyfoundatthesurface
Mostofthepeoplewhoappearmostoftenandmostgloriouslyinthehistorybooksaregreatconquerorsandgeneralsandsoldiers
ThehistoryofAfrican—Americansduringthepast400yearsistraditionallynarrated【1】anongoingstruggleagainst【2】andindiffe
WorkisaveryimportantpartoflifeintheUnitedStates.WhentheearlyProtestant【1】cametothiscountry,theybroughtthe【2
______,Mr.Wellsisscarcelyinsympathywiththeworkingclass.
Forthispart,youarerequiredtowriteacompositiononthetopicFoodsareoverwhelminglythemostadvertisedgroupofallco
Customhasnotbeencommonlyregardedasasubjectofanygreatmoment.Theinnerworkingsofourownbrainswefeeltobeuniqu
YoucannotimaginehowIfeel______withmydutiessometimes.
A、declareB、recommendC、adviseD、contendBdeclare意为“公开宣布”;recommend意为“正式建议或推荐”;advise意为“建议,忠告”;contend意为“争论,主张”。本题中,根据文中所用到的词语"s
随机试题
从资源管理的角度看,操作系统的主要功能包括处理器管理、存储管理、设备管理、联网与通信管理以及()。
猩红热样皮疹多见于频咳,喘憋重多见于
对于急性胰腺炎患者,以下哪项是护士
控制阀校准和试验要求包括()。
为了分清会计事项处理的先后顺序,便于记账凭证与会计账簿之间的核对,确保记账凭证的完好无缺,填制记账凭证时,应当( )。
宁夏旅游资源中的“两山一河”指的是()。
实施培训是指在企业培训组织管理部门或岗位人员的组织下,由培训教师实施培训,其主要内容不包括()。
下列作品中属于编年体历史著作的是()。
一个人的拥有,不是取决于机遇,而是取决于人的眼光。眼光______的人,只看到一时,而看不到一世;眼光______的人,只看到好的一面,而看不到坏的一面;只有那些眼光长远、______的人,才能拥有很多很多。填入横线部分最恰当的一项是()。
WhatistheMangoingtobuy?
最新回复
(
0
)