B[解析] 由第一段末句“Pressure at the source or pumping forces crude oil to the surface.”知B为正确答案。相关推荐 1How is crude oil brought to the surface A.By expansion of the hydrocarbons.B.By pressure and pumping.C.By vacuum created in the drilling pipe.D.By expansion and contrac...
2What is the passage mainly about? 3What is the passage mainly about? A. Works of Land Art B. History of Land Art C. Changes of Land Art D. Introduction of Land Art E. Land Art)又称“地景艺术”“土方工程”,它是指艺术家以大自然作为创造媒体,把艺术与大自然有机地结合起来,创造出...
How+adj./adv.+主语+谓动!此句若用what, 那么what important oil 就是一个整体,这样一来, 句子就没有主语了,所以不能用what.正确的是: How important oil is in our daily life!oil 为主语,是不可数名词, 因此前面不用冠词.句意: 石油在我们的日常生活中是多么重要啊!
With the increasing demand for energy such as oil and gas, people start to look for their sources in remote and untouched places. Do the advantages of this development outweigh the disadvantages? Give reasons for your answer and include any relevant examples from your own knowledge or experience...
Oil is a fossil fuel.It's used in gasoline.That powers boats,cars,and trucks.It's also used to make things.Some plastics,paints,and makeups are made with oil.Oil can be found below the ocean floor.Machines drill beneath the ocean.Then the oil is pumped out.This...
When it involves a repair, you must first remove the old oil seal. To remove an oil seal, it is important to use the right tools to avoid damaging the shaft and bore. The best solution is therefore to pull out the oil seal without having to completely dismantle the shaft. This can ...
Petroleum, also called crude oil, is a naturally occurring liquid found beneath the earth’s surface that can be refined into fuel. A fossil fuel, petroleum is created by the decomposition of organic matter over time and used as fuel to power vehicles, heating units, and machines, and can ...
百度试题 结果1 题目25% oil is obtained from one flaxseed. From how many kg of flax seeds is 1.5 kg of oil obtained? 相关知识点: 试题来源: 解析 x=6kg25/100 x = 1.525/100-x = 1.525x = 150= 6 反馈 收藏
Jeff Desjardins
Oil exploration to discover new drilling sites can expensive and risky, but also quite lucrative if a large reserve is identified. Understanding Oil Fields An oil field consists of a reservoir of fossil fuel found deep in the rocky strata of the Earth, wherehydrocarbonshave become trapped. An ...