Which of the following statements concerning frontal movements is TRUE ________．A.The temperature rises after a cold front passesB.The barometric pressure rises when a warm front passesC.A cold front generally passes faster than a warm frontD.A warm front

题目

Which of the following statements concerning frontal movements is TRUE ________．

A.The temperature rises after a cold front passes

B.The barometric pressure rises when a warm front passes

C.A cold front generally passes faster than a warm front

D.A warm front usually has more violent weather associated with it than a cold front

相似考题

1.The globe valve has a bulbous body, housing a valve seat and screw down plug or disc arranged at right angles to the axis of the pipeAccording to the above sentence, which of the following statements is not true?A.The profile of the valve is like a globeB.The valve seat is set into the bulbous bodyC.The plug or disc of the valve is made vertical to the axis of the pipeD.The valve seat is located at right side of the plug or disc

2.All the following statements concerning the nature of language change is true except()A language change is inevitableB language change is abruptC language change is universalD language change is extensive

3.The statements concerning nominal and real interest rate are true except that ______.A．the nominal interest rate is the growth rate of your moneyB．the real interest rate is the growth rate of your purchasing powerC．the nominal rate is the real interest rate deducted by the rate of inflationD．all of the above statements

4.Which of the following statements is true?A．The volume of deals for hedging purposes is much higher than that for arbitraging and speculative purposes.B．The foreign exchange business for commerce and tourism must be done before 11a.m.on 2 January.C．It is hedgers' money that drives much larger volume of other transactions.D．None of the above.

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  • 第1题：

    Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit?

    A.The mixture is too lean to burn

    B.The mixture is too rich to burn

    C.The vapor is about to explode

    D.Conditions are perfect for combustion


    正确答案：B

  • 第2题：

    Which of the following statements is FALSE，concerning the regulations pertaining to the cylinder room of a fixed CO2 fire extinguishing system ________．

    A.The compartment must be properly ventilated

    B.The temperature of the room should never exceed 130℉

    C.The door must be kept unlocked

    D.The compartment shall be clearly marked and identifiable


    正确答案：C

  • 第3题：

    Which statements concerning the relationships between the following classes are true？（）   class Foo {  int num；   Baz comp = new Baz（）；   }   class Bar {  boolean flag；   }   class Baz extends Foo {   Bar thing = new Bar（）；   double limit；   }  

    • A、A Bar is a Baz.
    • B、A Foo has a Bar.
    • C、A Baz is a Foo.
    • D、A Foo is a Baz.
    • E、A Baz has a Bar.

    正确答案:C,E

  • 第4题：

    多选题
    If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)
    A

    p + q is even

    B

    pq is odd

    C

    p2-q2 is even


    正确答案： A,B
    解析：
    由于所有大于2的质数都是奇数，因此p和q均是奇数，两奇数相加为偶数，所以A项正确；两奇数的乘积还是奇数，所以B项正确；两奇数的平方还各自是奇数，而两奇数的平方之差是偶数，因此C项也正确；所以选择A、B、C三项。

  • 第5题：

    多选题
    Which of the following statements are true? (Indicate all such statements.)
    A

    τ(5) =τ(7)

    B

    τ(5) τ(7) =τ(35)

    C

    τ(5) + τ(7) =τ(12)


    正确答案： A,B
    解析：
    5和7均只有两个正除数，因此根据题干信息，A项正确；35有四个正除数，所以B项也是正确的；12有6个正除数，因此C项错误；选择A、B两项。

  • 第6题：

    单选题
    Which of the following statements is TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels?（）
    A

    The securing of cargo on flats and trailers must be adequate to withstand road motions only

    B

    The movements experienced by road borne cargo are the same as the movements of a ship at sea

    C

    The generally recommended lash angle is no greater than 45 degrees relative to the deck in any direction

    D

    It is not necessary for an adequate number of securing points on the vehicles themselves since setting the brakes is sufficient


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Which of the following statements is true concerning centrifugal pumps?（）
    A

    They are particularly suited for pumping high viscosity fluids

    B

    They are started with the discharge valve opened

    C

    The flow of liquid is developed by imparting energy due to the rotation of an impeller

    D

    They are always mounted in a horizontal position


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the following statements concerning fire-tube boilers is correct?（）
    A

    Combustion gases flow through the tubes

    B

    Flames impinge on the tubes

    C

    Combustion occurs in the tubes

    D

    Water flows through the tubes


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following statements is correct concerning the “flash point ” of a liquid?（）
    A

    It is lower than the ignition temperature

    B

    It is the temperature at which a substance will spontaneously ignite

    C

    It is the temperature at which a substance, when ignited, will continue to bum

    D

    It is the temperature at which the released vapors will fall within the explosive range


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following statements is true concerning simple parallel resistance circuits?（）
    A

    The total current flow equals the sum of the individual currents

    B

    The total current flow equals the reciprocal of the sum of the individual currents

    C

    The total resistance equals the sum of the individual resistance

    D

    The total voltage equals the sum of the individual voltages across each resistance


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following statements concerning frontal movements is TRUE（）.
    A

    The temperature rises after a cold front passes

    B

    The barometric pressure rises when a warm front passes

    C

    A cold front generally passes faster than a warm front

    D

    A warm front usually has more violent weather associated with it than a cold front


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following statements is correct concerning the viscosity of lubricating oil?（）
    A

    Viscosity will increase as temperature increases

    B

    Viscosity is a measure of a fluid s internal resistance to flow

    C

    Viscosity will decrease as temperature decreases

    D

    Viscosity is not dependent on temperature


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which of the following statements is TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels?

    A.The securing of cargo on flats and trailers must be adequate to withstand road motions only

    B.The movements experienced by road borne cargo are the same as the movements of a ship at sea

    C.The generally recommended lash angle is no greater than 45 degrees relative to the deck in any direction

    D.It is not necessary for an adequate number of securing points on the vehicles themselves since setting the brakes is sufficient


    正确答案：C

  • 第14题：

    Which of the following statements is true?__________

    A.The author believes that a born naturalist can not be a scientist
    B.The author read a lot of books about the natural world and oil industry
    C.The author's brothers and sisters were good at music and languages
    D.The author spend a lot of time working on riddles

    答案：C
    解析：
    由第一段“Unlike them，I had no ear for music and languages”，可知，作者的兄弟姐妹们擅长于音乐和语言，故C项正确。A项无中生有，B项oilindustry错误，D项与第三段矛盾。

  • 第15题：

    单选题
    Which of the following statements concerning energy is correct?（）
    A

    Energy can be created or destroyed

    B

    Energy may not be transformed

    C

    The total quantity of energy in the universe is always the same

    D

    None of the above


    正确答案： D
    解析： 暂无解析

  • 第16题：

    多选题
    Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
    A

    c=d

    B

    l and k are parallel

    C

    m and l are perpendicular


    正确答案： C,B
    解析：
    根据题目中的已知信息无法推断出各直线的关系，因此B、C均不正确；而由图示可知，c和d分别是a和b的补角，由于a=b，所以c=d，A项正确。

  • 第17题：

    单选题
    Which of the following statements concerning cargo is correct?（）
    A

    Cargoes are any type of goods transported by any type of ships

    B

    Cargoes are goods transported in bulk

    C

    Cargoes usually include goods transported in bulk and in containers

    D

    Cargoes are usually packaged in containers


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following statements is true concerning the overall efficiency of air compressors?（）
    A

    High pressure compressors are more efficient than low pressure compressors

    B

    Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit

    C

    Two stage compressors are generally more efficient than single stage compressors

    D

    The volumetric efficiency is decreased in multistage compressors


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    Which of the following statements is true concerning any evaporator?（）
    A

    High conductivity of the distillate indicates distillate salinity is excessive

    B

    Increasing the absolute pressure of the shell will increase the distillers capacity

    C

    Mesh separators are used in evaporators to filter the distillate

    D

    Reducing the brine density will reduce the heat lost overboard


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the following statements is true concerning the cetane number of diesel fuel?（）
    A

    The cetane number affects the amount of injection lag

    B

    The cetane number is an indication of the fuels viscosity

    C

    Ignition lag is reduced with fuels having a high cetane number

    D

    The cetane number is of little significance in the combustion process


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following statements is true concerning an oil cooler?（）
    A

    The oil temperature is less than the cooling water temperature

    B

    The oil pressure is less than the cooling water pressure

    C

    The oil pressure is greater than the cooling water pressure

    D

    The oil flow control valve is always installed in the oil input line


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following is not a frontal term（）.
    A

    Ridge

    B

    Col

    C

    Trough

    D

    Bora


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）
    A

    The agent is considered nontoxic at room temperature in low concentrations

    B

    The agent is less effective than carbon dioxide

    C

    Halon primarily extinguishes the fire by cooling

    D

    The agent cannot be used on electrical fires because it leaves a residue


    正确答案： B
    解析： 暂无解析

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