A: 80%
B: 99%
C: 70%
D: 79%
举一反三
- Organic chemicals mainly come from oil, natural gas, and . A: metal B: air C: water D: coal
- Often associated with crude oil, natural gas is principally made up of_______ and other hydrocarbon gases.
- When the crude oil is obtained from the field, it is taken to __________ to be treated. The commonest form of treatment is heating. A: the corporations B: the refineries C: the pipelines
- In almost all chemical-process plants, heat is ______ by burning of fossil fuels-coal, oil, or natural gas. A: transformed B: conducted C: transferred D: generated
- Generally speaking, effective ingredients extracted from natural minerals, animals or plants, as well as drugs obtained by chemical synthesis or biosynthesis are collectively known as chemical drugs.
内容
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名词：原油，a mineral oil obtained from below the surface of the Earth, and used to produce pertrol , paraffin , and various chemical substance._________________.
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which one is true about Russia A: It is an African nation with a large area of land B: It is rich in tropical agricultural resource C: It imports large amount of wheat and natural gas. D: It is one of the biggest exporters of natural gas and oil
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In terms of equivalent calorific value, the lowest price among coal, oil, natural gas and renewable energy is ( ). A: oil B: coal C: renewable energy D: natural gas
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In the present 13th Five-Year Plan period, China lays stress on the import of ____________. A: advanced technology B: advanced equipment C: high quality consumer goods D: crude oil and natural gas
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The role and position of unconventional oil and gas resources in global oil and gas production are becoming more and more important. Which of the following are unconventional oil and gas resources? A: Tight rock oil and gas B: Mud shale oil and gas C: Coalbed methane D: Oil shale E: Oil sands F: Natural gas hydrate