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
34
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://jikaoti.com/ti/J8JYFFFM
0
考博英语
相关试题推荐
Somepeoplewanttomakeasmuchmoneyastheycanbecausetheybelievethatmoneycanbringthemfameand______.
Ifyouwantto______apleasantvisit,findoutasmuchaspossibleaboutthemannersandcustomsofyourhostcountry.
Shouldwecareifover150knownspeciesofanimalshave【1】fromtheearthinthelastfiftyyears?Shouldwebeconcernedthatt
Susanpreferstohaveherleft______photographedasshebelievesthat’sherbetterside.
Ifacatcomestooclosetoitsnest,themockingbird______asetofactionstoprotectitsoffspring.
Withthepossibleexceptionofequalrights,perhapsthemost【1】issueacrosstheUnitedStatestodayisthedeathpenalty.Many
TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparativeseldomusedinordinaryconversation.
Ifitistruethatmoralitycannotexistwithoutreligion,thendoesnottheerosionofreligionheraldthe______ofmorality?
Heisa(n)_____andwell-behavedchild,buthisparentsworryabouthimforhetalkstoolittle.
Thedyingsoldierhadthemessage_____straighttotheheadquarters.
随机试题
据报道一种直接把醛转化至酯的方法。适用于α,β-不饱和醛和芳香醛。方法为将醛和氰化钠、二氧化锰在含一些醋酸的甲醇溶液中搅拌几个小时。产物是α,β-不饱和酸或芳香酸甲酯,试说明该方法的理论依据。
在市场经济国家,财政政策的总目标一般是()。
背景材料:某施工单位承接了某二级公路的施工,工程合同总价为6758万元。其工程划分见下表:本项目中的桥梁工程为一座3×25m简支梁桥,梁板采用预制构件。根据施工组织安排,排水工程(B)开始施工20d后才能开始路基土石方工程(
会计核算工作的基础环节是()。
甲公司为增值税一般纳税人,适用的增值税税率为17%,2014年11月30日资产负债表部分项目余额如表所示:2014年12月发生如下交易或事项:(1)2日,以银行存款1200万元购入一宗土地使用权,甲公司将其用于建造厂房。甲公司预计该宗土地使用权可以使
学校的中心工作是()。
按照认知心理学的观点,划分机械学习与有意义学习的主要依据是()。
有四个数每次取三个数,算出它们的平均数再加上另一个数,用这种方法计算了四次,分别得到以下四个数:86,92,100,106。则原来四个数的平均数是()。
DMA方式是在()之间建立直接的数据通路。
设y=y(x)由确定,则=___________.
最新回复
(
0
)