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【单选题】
实证经济学与规范经济学的根本区别是A.
研究方法的不同
B.
研究对象的不同
C.
研究范围的不同
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举一反三
【简答题】堆积密度是指材料在 状态下单位体积的质量,按 式计算。
【简答题】Recently models have been created which give ______
【单选题】Which systems development life cycle models include two parts of other models?
A.
Rapid application development
B.
Joint application development
C.
SDLC model
D.
The spiral model
【单选题】Which of the following statements about models is correct?
A.
The more details a model includes, the better the model.
B.
Models assume away irrelevant details.
C.
Models cannot be used to explain how the economy functions.
D.
Models cannot be used to make predictions.
【简答题】密度是指材料在 状态下单位体积的质量。
【简答题】已知单一元件交流电路中,某元件的阻抗与频率成反比,则该元件是 。
【单选题】They ask about the things and teachers ______ they still remembered in the school.
A.
which
B.
that
C.
whom
D.
who
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