A high negative ion count is likely to be found _______.
A: near a pond with a water pump
B: close to a slow-flowing river
C: high in some barren mountains
D: by a rotation water sprinkler
A: near a pond with a water pump
B: close to a slow-flowing river
C: high in some barren mountains
D: by a rotation water sprinkler
D
举一反三
- A high negative ion count is likely to be found ______. A: near a pond with a water pump B: close to a slowly flowing river C: high on some barren mountains D: near a fountain
- The best irrigation water is river water, pond water and lake water A: 正确 B: 错误
- The tap water is flowing water, and its oxygen content is pretty high which can benefit the volatilization of the tea scent. A: 正确 B: 错误
- Mean high water is the average height of（）. A: The higher high waters B: The lower high waters C: The lower of the two daily tides D: All high water
- Water attains the boiling temperature quicker in the high elevations than at the low level. Because: A: . the air pressure is lower at high elevations B: . the gravitational force is low in the mountains C: . the sunlight is high in the higher elevations D: . All of them
内容
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中国大学MOOC: "Lofty Mountains and Flowing Water" was a very famous guqin piece.
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The water used in the ship's sanitation system is generally _____. A: low temperature fresh water B: high temperature fresh water C: water produced by water generator D: seawater
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Mean high water is the average height of（）. A: The higher high waters B: The lower high waters C: The lower of the two daily tides D: All high waters
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254. Mean high water is the average height of ____
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Which one is not the major facility of water injection station: A: high-pressure pump system for improving injection pressure B: Christmas Tree C: flowmeter for measuring water rate D: the surface network for flowing in and out