首页
登录
职称英语
[audioFiles]2016m8x/audio_ezfj_ezflisteningd_201607_200[/audioFiles] Petrole
[audioFiles]2016m8x/audio_ezfj_ezflisteningd_201607_200[/audioFiles] Petrole
游客
2023-11-01
43
管理
问题
选项
答案
Petroleum
Petroleum has been important since ancient times. / The Greek historian told of its use in the form of pitch for building and road making. /
Petroleum is a fossil fuel. / The liquid comes from the remains of plants and animals / that died millions of years ago. / These remains were buried deep below levels of rock over time and under great pressure. /
This geological process created complex molecules of hydrogen and carbon. / Oil can also contain other elements. / Crude oil, or unprocessed petroleum, / is called sour when it contains a lot of sulphur, an impurity. / Sour crude requires more refining than sweet crude, / which is low in sulphur and, as a result, often more valuable. /
The modern history of oil started in the middle of the 1800s. / At that time, a method was found to make kerosene fuel from petroleum. / This kind of fuel became popular for heating and lighting. /
解析
石油
石油自古以来就非常重要,它是深埋在岩石层下达数百万年的动植物遗体在重压下经年累月形成的。石油的现代史开始于19世纪中期,那时人们已经知道如何从石油中提炼出煤油了。
转载请注明原文地址:https://tihaiku.com/zcyy/3148936.html
相关试题推荐
[audioFiles]2015m6x/audio_ezfm_064_20154[/audioFiles]Th
[audioFiles]2015m6x/audio_ezfm_101_20154[/audioFiles]
[audioFiles]2015m6x/audio_ezfm_090_20154[/audioFiles]St
[audioFiles]2015m6x/audio_ezfm_001_20154[/audioFiles]
[audioFiles]2015m7s/audio_ezfz2015_001_20155[/audioFiles]Ma
[audioFiles]2015m7s/audio_ezfj_20155_009[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_007[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_005[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_004[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_003[/audioFiles]
随机试题
TheImportanceofJustBeingThere"What’sthemost
ArtificialIntelligence(AI)A)Weoftendon’tnoticeit,butartificialint
PASSAGEFOURSlaughterhouses题目问的是装配线这一构想的来源。第4段最后一句提到这种方法起源于屠宰场,且第5段对此作了详细介绍,因此可
Youcaninsureallyourpropertyagainstlossbythetheft(偷盗)orfireduringy
以下金融机构可以提供汽车贷款的有()。A.商业银行 B.城乡信用社 C.获
天津精神是_________、_________、开放包容。
证券估值是对证券( )的评估。A.价格 B.收益率 C.波动性 D.价值
A.摄正侧位片 B.摄切线位片 C.摄正斜位片 D.摄侧轴位片 E.摄肋
患者女性,28岁。孕2产0。孕33周阴道少许流血2天,规律腹痛3小时,肛查子宫颈
何人在何书中最早按病因病机把疾病分为风、寒、暑、湿、燥、火六类 A.张仲景的《
最新回复
(
0
)