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The productivity of working shifts can be improved through a decrease of().
A . working hours
B . gangs
C . idle time
D . weight per set
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Bridge gauge can be used to measure () of a diesel engine.
A . diameters of journals
B . deflections of crankwebs
C . diameters of crankpins
D . none of the above
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The smallest size of flaw that can be detected on a radiograph examination of a weld will be indicated by the().
A . film speed
B . penetrometer
C . exposure reading
D . time of exposure
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Which three objects can be components of a menu module?()
A . windows
B . parameters
C . object groups
D . report objects
E . visual attributes&e
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The efficiency of a flash type evaporator can be increased by()
A . lowering brine discharge density
B . decreasing the absolute pressure of each stage
C . increasing the saltwater feed heater temperature
D . increasing the pressure at the spray pipe
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To which of the following resources can a lock be applied?()
A . Row
B . Alias
C . Bitmap
D . Colum
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The main bearing shells are made of steel with a lining of bearing metal which may be white metal, copper-lead or aluminum-tin alloy What is the meaning of “which” in the sentence above?()
A . main bearing shells
B . main bearing
C . steel
D . bearing metal
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The nozzle of a gasoline hose or can should be kept().
A . in contact with the fill opening to guard against static spark
B . from making contact with the fill opening to guard against static spark
C . in contact with the fill opening to allow proper venting
D . None of the above
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High speed aircraft is made of metals that can()both high temperature and pressure.
A . stand by
B . put up with
C . withhold
D . withstand
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Faulty operation of diesel engine fuel injection nozzles can be a direct cause of().
A . excessive fuel nozzle holder cooling
B . sediment in the fuel supply
C . distortion of the fuel spray pattern
D . improper atomization of the fuel
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A trigger can be created on which of the following objects?()
A . View
B . Catalog Table
C . Stored Procedure
D . Global Temporary Table
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A(n) () is a mechanical attack on the metal surface which may be due to a disturbance in the flow of the water over the blade of the propeller.
A . erosion
B . corrosion
C . pitting
D . dezincificatio
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A change of a Chinese vessel’s name can only be made by the ().
A . CCS
B . the Customs
C . MOC
D . MSA
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Which three of these can be a forwarding equivalence class? ()
A . IPsec tunnel
B . routing equivalence paths
C . traffic engineering tunnel
D . bridge or switch instance
E . groups of IP addresse
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The subject of a memo can be :
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Water can be seen as a symbol of rejuvenation and purification.
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Which of the following can be a member of a band?
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Any kind of bill of lading can be transferred as a document of title.()
此题为判断题(对,错)。
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If the Balance Sheet and Statement of Owner’s Equity columns of a work sheet fail to balance when the amount of the net income is added to the Balance Sheet and Statement of Owner’s Equity Credit column, the cause could be:
A.AnexpenseamountenteredintheBalanceSheetandStatementofOwner’sEquityDebitcolumn.
B.ArevenueamountenteredintheBalanceSheetandStatementofOwner’sEquityCreditcolumn.
C.AnassetamountenteredintheIncomeStatementandStatementofOwner’sEquityDebitcolumn.
D.AliabilityamountenteredintheIncomeStatementandStatementofOwner’sEquityCreditcolumn.
E.AnexpenseamountenteredintheBalanceSheetandStatementofOwner’sEquityCreditcolumn.
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Too much metal in the soil is considered pollution. Yet too little metal in a person's diet can cause health problems. An American scientist says the answer to both problems may be plants that take up large amounts of metal in their tissues.
David Salt is an expert on plants at Purdue University in West Lafayette, Indiana. He is working with plants that store large amounts of metals.
In recent years, scientists have shown interest in using such plants to clean up harmful waste materials. Professor Salt says such plants also could be used to improve people's diets or even to create foods that fight cancer.
Humans need a number of metals in their diets, including iron and zinc. These metals are needed in very small amounts, however. That is why they are called micronutrients. The lack of micronutrients is blamed for health problems in many developing countries. Children and pregnant women are mostly affected.
Recently, Mr. Salt announced that he has identified and copied the genes from a kind of plant that stores metals in its tissues. He says his study suggests it may be possible to develop plants that contain minerals needed for good health.
For example, the metal selenium is a strong anti-cancer agent. Some wild plants store selenium naturally. Mr. Salt says foods to fight cancer might be created if genes from these plants could be moved into crop plants.
Locoweed, which is a common plant in the western U.S., stores selenium. Professor Salt says it may be possible to create cancer-fighting foods from it. He and scientists from a company called Unicycle Therapies have copied the gene that causes locoweed to take up selenium from the soil.
Many people take pills to add important minerals or vitamins to their diet. However, Mister Salt notes that most selenium products sold in health food stores are of little use. That is because the human body can only take in and use selenium if it is in the right chemical form.
The scientist says his team would like to develop a vegetable crop high in selenium. He wants to create an anti-cancer product in the foods we already eat.
According to Pro. Salt, plants that take up large amounts of metal in their tissues can be used to ______.
A.clean polluted soil and cure disease like cancer
B.clean up harmful waste materials in soil and improve people's diet
C.produce large number of micronutrients such as iron and zinc
D.create food with important minerals or vitamins
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Which of these can be a part of software requirement specification()
A.A set of models
B.a written document
C.a set of tables
D.Both a and b
E.all of the above
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A view of the lake can be seen here (view的意思是)()
A.一瞥
B.一眼
C.看到(的事物)
D.想法
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Ceramics can be produced at than that of competing metal-alloy components_____.
A.A.More cost
B.B.More density
C.C.Less cost
D.D.Less density
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Which of the following is an analyst least likely to be able to find on or calculate from either a common-size income statement or a common-size balance sheet?
A、Inventory turnover.
B、Operating profit margin.
C、Debt to equity ratio.