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【单选题】
对市场现象的( )是运用逻辑分析方法,运用各种相关的科学理论,对整理、统计过的市场资料进行思维加工;揭示市场现象的本质和规律性,预计市场现象的发展趋势,对其做出理论说明;在此基础上进一步对实际工作提出具体建议。A.
整理资料
B.
定性研究
C.
统计分析
D.
鉴别资料
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【单选题】The Wilson equation is the most widely used equation in engineering design. Which of the following statement is incorrect?
A.
The high calculation accuracy of Wilson equation is due to the introduction of the concept of local composition and considering the effect of temperature on activity coefficient.
B.
The Wilson equation is suitable for Polarity and association system
C.
The thermodynamic properties of ternary system can be calculated by Wilson equation with parameters from binary system
D.
Wilson equation can be used for liquid-liquid equilibrium system
【多选题】A fundamental differential equation obtained by combining the ( ).
A.
continuity equation
B.
flow law
C.
equation of state
D.
equation of motion
【单选题】Choose the better version of the sentences that best improve the original sentences. As we know, the current equation is different in CCM or DCM with different inductance, but no paper proposed the an...
A.
T he current equation is different in CCM or DCM with different inductance, but no paper proposed the analytical equation to describe it. This paper is devoted to the accurate equation of the inductor without referring to how to design the inductor and select the power device and its heat sink.
B.
Although the current equation is known to be different in CCM or DCM with different inductance, no paper proposed the analytical equation to describe it. This paper is devoted to the accurate equation of the inductor with no reference to how to design the inductor and select the power device and its heat sink.
C.
Although the current equation is known to be different in CCM or DCM with different inductance, no paper proposed the analytical equation to describe it. This paper is devoted to the accurate equation of the inductor without referring to to how to design the inductor and select the power device and its heat sink.
D.
Although the current equation is known to be different in CCM or DCM with different inductance, no paper proposed the analytical equation to describe it. This paper is devoted to the accurate equation of the inductor with no reference to how to design the inductor and how to select the power device and the heat sink.
【简答题】The most widely used equation for estimating visibility is the Koschmeider equation: (2.4) where L V is the visual range, the distance at which an average person can barely distinguish a dark object (...
【简答题】Indicate whether the equation determines y to be a function of x . Match each equation with the corresponding answer. Choose the correct letter for each question.
【简答题】数量方程(quantity equation)
【简答题】Choose an equation and express it using one sentence.
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