On some of the oil-blessed lands, which energy resource is still scare?
Water
举一反三
- Coal, oil and natural gas are __________ and __________. A: clean ... recyclable B: renewable resource ... unconventional energy C: non-renewable resource ... conventional energy
- People are aware that coal, which has gone to mass production, is still a finite resource, though _________ than either oil or gas.
- They still have some problems _____ in designing the energy vehicles.
- Which of the following is irreplaceable resource? A: solar energy B: petroleum C: wind power D: tidal energy
- In the future, China's energy consumption will still be dominated by fossil energy, in which coal is the main energy.
内容
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Which of the following is clean source of energy () A: Coal B: Oil C: Solar D: Natural<br/>gas
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They still have some problems _____________________ in designing the new energy vehicle. A: overcome B: overcoming C: to overcome D: overcomes
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Why does decision-making scare some people?
- 3
Impurities in the fuel oil will affect the operation of the engine， which has （） the use of separator and some other devices.
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Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartridgesThe bold and italic word “which” means （）. A: lubricating oil B: lubricating oil systems C: strainers D: cartridge