In a domestic fresh water system, the pump starters are controlled by （） switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.
A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.
A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a（）.
In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?（）
The vertical movement of a vessel in the water is called（）.
The pressure difference of the gauge on the oily water separator increases greatly, the reason is（）
（）the packing is the same，the lots are different in marks.
In an auxiliary boiler steam and water system, the highest pressure will be in the （）.
（） allows for expansion and water make up in the water cooling system.
One of the causes of ocean currents is density differences in the water. This is true because （）.
（）mineral water is there in the bottle?
In the closed cooling system, the water （）.
In （）, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
There is（）water in the glass, is there?
A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.
77. ______ water is the water in the hold to keep the ship's stability.
In the article, the authors give different definitions of history from different perspectives.
What’s the most obvious difference among animal-driven chain pump, water-driven chain pump and wind-driven chain pump?
In the same language, the same concept cannot be expressed in different words.
In what way is culture like the water a fish swims in?
Why is the word“different”in italics？
The evolution theory explains the differences in sleep among animals.英译汉The evolution theory explains the differences in sleep among animals.英译汉
While therere some differences in the eduction systems in mny countries in the world, eductionWhile therere some differences in the eduction systems in mny countries in the world, eduction is __________.humorous B．universl C．fithful D．foolish
Your network consists of a single domain. All domain controllers run Windows Server 2003 ServicePack 2 (SP2). All client computers run Windows XP Professional Service Pack 3 (SP3).You need to ensure that users’ personal settings are the same when they log on to different clientcomputers in the domain.What should you do？ （）
