13 Crude oil is a mixture of different chemicals called fractions.(a) What is the name of the process used to separate crude oil into fractions?[1](b)Table 13.1 shows the stages in the separation of crude oil into fractions.The stages are not in the correct order.Stages in the ...
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They are sedimentary rocks, rocks which were laid down by the action of water on the bed of the ocean. Almost always the remains of shells, and other proofs of sea life, are found close to the oil. A very common sedimentary rock is called shale, which is a soft rock and was obviousl...
What I need is ___ book that contains ___ ABC of oil painting. A.a; 不填 B.the; 不填 C.the; an D.a ; the
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此题all为先行词,后面that is needed为that引导的定语从句,且作从句中的主语,由于all为不定代词,此时关系词不可用which,而what不可引导定语从句;当然,若无all可选C,因为此处的All that="what…,若All" the thing为先行词,后面缺乏引导定语从句的关系代词that(且在从句中作主语,不可省略),故A后应加that。
Understanding Crude Oil Crude oil is typically obtained through drilling, where it is usually found alongside other resources, such as natural gas (which is lighter and therefore sits above the crude oil) and saline water (which is denser and sinks below). After its extraction, crude oil is ...
Usage: Solid-Liquid Separation, Oil Impurities, Oil-Water Separator, Oil and Gas Separation; Type: Suction Filter; Mechanical Principle: Vacuum; Performance: Efficient Filtration; Function 1: Oil Dehydraution; Function 2: Oil Filtering; Function 3: Constant Heating;...
【题目】All ___ is needed is a supply of oil. A. the thing B. that C. what D. which相关知识点: 试题来源: 解析 【答案】B 【解析】 句意:所有的需要就是油的供应。此题all为先行词,后面that is needed为that引导的定语从句,且作从句中的主语,由于all为不定代词,此时关系词不可用which,...
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