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【单选题】
投资项目可行性分析的主要内容是( )。A.
技术可行性分析
B.
环境可行性分析
C.
市场可行性分析
D.
财务可行性分析
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【简答题】我们家中的暖气的壁面为什么总是不规则的形状?暖气的壁面温度是接近暖气内热水的温度还是接近室内空气的温度?为什么?
【单选题】A production possibilities frontier is bowed outward when
A.
the more resources the economy uses to produce one good, the fewer resources it has available to produce the other good.
B.
an economy is self-sufficient instead of interdependent and engaged in trade.
C.
the rate of tradeoff between the two goods being produced is constant.
D.
the rate of tradeoff between the two goods being produced depends on how much of each good is being produced.
【单选题】A production possibilities frontier is a straight line when
A.
the more resources the economy uses to produce one good, the fewer resources it has available to produce the other good.
B.
an economy is interdependent and engaged in trade instead of self-sufficient.
C.
the rate of tradeoff between the two goods being produced is constant.
D.
the rate of tradeoff between the two goods being produced depends on how much of each good is being produced.
【简答题】已知抛物线 的准线方程是直线x=-1,则其焦点坐标为_________
【简答题】已知椭圆 的右准线是抛物线的准线，抛物线的顶点是原点，求抛物线方程
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