Sintering furnaces usually heat ceramic compacts externally by following thermal transfer_____.

相似题目

• The premium is usually included in（）.

  A . the indemnity B . the franchise C . the freight rate D . the cargo cost

  查看最佳答案

• She usually wears casual（）.

  A . dress B . coat C . clothes D . cloth

  查看最佳答案

• The forced draught fan should be started and air passed through the furnace for several minutes to “（）” it of any exhaust gas or oil vapors.

  A . blow B . clean C . scavenge D . purge

  查看最佳答案

• The principal is usually the importer.

  A . 正确 B . 错误

  查看最佳答案

• One of the main purposes of refractories in a boiler furnace is to（）

  A . help preheat the air for the furnaces B . help preheat the feedwater C . protect economizer from excessive heat D . prevent excessive furnace heat losse

  查看最佳答案

• About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）

  A . an engine-driven；as well B . an engine-driven；has an independent pump C . an independent；as well D . an independent；has an engine-driven pum

  查看最佳答案

• A dazzling white burner flame in the boiler furnace indicates （）.

  A . no combustion B . deposits in the fuel C . excessive air in the fuel D . cold fuel oil

  查看最佳答案

• Too much air in the furnace of an oil-fired boiler would be indicated by （）.

  A . yellowish flame B . golden yellow flame C . white flame D . brilliant white flame

  查看最佳答案

• Anticyclones are usually characterized by（）.

  A . dry，fair weather B . high winds and cloudiness C . gustiness and continuous precipitation D . overcast skie

  查看最佳答案

• A distorted furnace in a fire-tube auxiliary boiler may be the result of （）

  A . firing for extended periods in the low fire mode B . overheating, due to waterside deposits C . varying the water level above the crown sheet D . carrying excessive alkalinity in the boiler water

  查看最佳答案

• The defective places in the furnace （） with fire bricks.

  A . should be paved B . should be cleaned C . should be dismantled D . should be welded

  查看最佳答案

• The furnace of an oil fired boiler should be （） before the operating burner is lit.

  A . filled with water B . purged C . cleared of air D . None of the above is true

  查看最佳答案

• 选中（），可在健入时自动将"Usualy"改为"Usually"。

  A . 英文句首字母大写 B . 更正误按CAPSLOCK键产生的大小写错误 C . 键入时自动替换 D . 英文句首字母小写

  查看最佳答案

• Minor supporting ideas are usually( )?

  A.words B.sentences C.numbers D.statistics

  查看最佳答案

• Apartments are usually used in America, while ______ are usually used in UK.

  查看最佳答案

• Business appointments are usually very formal.

  查看最佳答案

• The Super Bowl is usually held ().

  查看最佳答案

• What does a resume usually consist?

  查看最佳答案

• Packing can be divided into transport packing (usually known as outer packing) and sales packing (usually known as packing).

  查看最佳答案

• The purpose of the ashing step in graphite-furnace atomic-absorption spectroscopy is to（) A．vapor

  The purpose of the ashing step in graphite-furnace atomic-absorption spectroscopy is to( ) A．vaporize metal atoms to be analyzed B．cause the metal species to form carbides which are more volatile C．convert the graphite furnace to ash to avoid carbide formation D．burn off organic species that would interfere with the eletnental analysls

  查看最佳答案

• When does sleepwalking usually occur？

  A．During active sleep, B．During deep sleep. C．In the daytime. D．In the early morning.

  查看最佳答案

• 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.

  If the body takes in more carbohydrates【C5】______are used for energy, the【C6】______is stored. Two storage places are the liver(肝)and muscles. There is a【C7】______, however, to the amount of carbohydrates they can【C8】______. When they are filled and they always【C9】______be for you to feel your best, excess carbohydrates are changed to fat and【C10】______around the body. If the body does not take【C11】______a sufficient amount of food, it will use its stored fat for energy. If you【C12】______at all, the body would use up all the stored fats and【C13】______it would use its own protein in order to keep【C14】______as long as possible. Therefore, the【C15】______amount of food you eat should be in【C16】______with your energy requirements. It is not necessary,【C17】______, for you to go【C18】______counting calories(卡路里)and weighing food. If a person is the【C19】______weight, it is safe to【C20】______that he is eating enough. 【C1】 A．has B．needs C．does D．is

  查看最佳答案

• Express service usually charges more.（)

  是 否

  查看最佳答案

• the english usually say “thank you”.（)

  是 否

  查看最佳答案