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
Oil pools are valuable underground accumulations of oil, and oil fields are regions underlain by one or more oil pools. When an
Oil pools are valuable underground accumulations of oil, and oil fields are regions underlain by one or more oil pools. When an
admin
2014-09-29
103
问题
Oil pools are valuable underground accumulations of oil, and oil fields are regions underlain by one or more oil pools. When an oil pool or field has been discovered, wells are drilled into the ground. Permanent towers, called derricks, used to be built to handle the long sections of drilling pipe. Now portable drilling machines are set up and are then dismantled and removed. When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it. Although this rise of oil is almost always carefully controlled today, spouts of oil, or gushers, were common in the past. Gas pressure gradually dies out, and oil is pumped from the well. Water or steam may be pumped down
adjacent
wells to help push the oil out. At a refinery, the crude oil from underground is separated into natural gas, gasoline, kerosene, and various oils. Petrochemicals such as dyes, fertilizer, and plastic are also manufactured from the petroleum.
Which of the following can be inferred from paragraph 3 about gushers?
选项
A、They make bringing the oil to the surface easier.
B、They signal the presence of huge oil reserves.
C、They waste more oil than they collect.
D、They are unlikely to occur nowadays.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/nTfO777K
0
托福(TOEFL)
相关试题推荐
Completethenotesbelowusingwordsfromthebox.ArtGalleryCathedralCastleGardensMarketsTouristattractionsopenallday
Completethetablebelow.WriteNOMORETHANTHREEWORDSforeachanswer.
Theownersoftheundergroundhouse
Choosethecorrectanswer,A,BorC.WhatchangecausedchangesincrocodilepopulationsinNorthAfrica?
WhatdoesChloedecideaboutthefollowingsubjects?Writethecorrectletter,A,BorC,nexttoquestions26-30.AShewills
Whatproblemisidentifiedwitheachofthefollowingnaturaldyes?ChooseSIXanswersfromtheboxandwritethecorrectletter
Whatproblemisidentifiedwitheachofthefollowingnaturaldyes?ChooseSIXanswersfromtheboxandwritethecorrectletter
Whatdoesthepassagemainlydiscuss?Accordingtothepassage,whyistheLakeWalesRidgevaluable?
ThewidevarietyofclimatesinNorthAmericahashelpedspawnacomplexpatternof soilregions.Ingeneral,thereal
A、RecentlydiscoveredmanuscriptsB、SimilaritiesamongreligionsC、MethodsofanalyzingancientmanuscriptsD、Howancientmanusc
随机试题
甘肃是取甘州(今张掖)与肃州(今武威)二地的首字而成。()
革兰氏染色结果,菌体呈紫色的为革兰氏阴性菌(G-),红色者为革兰氏阳性菌(G+)。
老年性白内障的预防方法为
预防肺结核最关键、最有效的措施是
依据《中华人民共和国防沙治沙法》,在沙化土地范围内从事开发建设活动,必须依法提交环境影响报告;环境影响报告应当包括()。
某氯乙醇厂房专用的8KV配电站贴邻厂房设置,该厂房的下列防火防爆做法中,符合现行国家标准要求的是()。
导游员张某因私自转借导游证供他人使用被扣除6分,又因在导游中着装不整洁被扣除2分,年审时他将受到()。
请简述幼儿园艺术领域的教育目标。
由于常对象不能被更新,因此()。
Initially______expectation,Stellawasdismayedtolearnthathernewdutieswouldnotbeperformedinthegolden______ofa
最新回复
(
0
)