Water and air are _______ to human beings. We can not live without them.
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189. Light List for coastal water are _____
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there is no water and air on the moon, is there?_____________________
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____ no air or water, there would be no life in the world.
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The land is affected by a ________ and the cattle are dying fast for lack of drinking water.
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Scientists are working on the __________ of salt water into fresh water.
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______ are rates which are applicable to special type of freight in air cargo transportation.
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We call water, electricity and sewer______.
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According to Aristotle’s theory, everything is made out of four ______: earth, air, fire, and water.
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You are in a tropical port．The refrigeration machinery on a container loaded with air-cooled fruit fails．It cannot be repaired for 18 to 24 hours．Which step should you take to reduce the temperature rise and spoilage of the fruit ________．
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The two elements ,______water is made up are the gases oxygen and hydrogen.
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The two elements______water is made are oxygen and hydrogen.
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They made a fire in the open air and cooked a meal over it. ______ was made in the open air and a meal ______ over it.
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The razor and water _____ the job.
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—Excuse me, ______？ —Yes. That's one glass of white wine, one mineral water and one sandwich. Ten pounds, please. —Thanks. Is service included？ —No. —OK, here you are.
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The color and smell of water in these rivers_____itself how serious the pollution is but many people are still ignoring he fact.
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In some ways, the human body is both like a furnace and like an engine. It must have fuel to produce heat as a furnace【C1】______. It must have fuel to produce motion and do【C2】______as an engine does. The nutrients(营养物)which【C3】______energy best are carbohydrates(碳水化合物)and fats. Protein can also be used as fuel. Minerals, vitamins, and water,【C4】______extremely valuable to the body, cannot be used as fuel.
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We all know the truth_____there are air, water and sunlight there are living things.
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In the extremely hot and dry environment, creatures are imagined to have ______ to minimize loss of water and conserve it.
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There are rules for companies that supply__ like electricity and water to let competitors use their wires and pipes（）