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【单选题】
幼儿园的任务 不 包括( )A.
对幼儿实施保育
B.
为家长工作，学习提供便利
C.
为幼儿园盈利
D.
对幼儿实施教育
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举一反三
【简答题】电阻值为R的一段导线，将它从中间对折，合成一段新导线，接到电压为20v的电源两端，其阻值为（），若将电源电压升为40v，其阻为（）。
【简答题】minimum efficient scale
【单选题】What is the minimum efficient scale (MES) of production?
A.
The point on an average cost curve where the cost per unit begins to decline more rapidly
B.
The minimum point on a U-shaped average cost curve
C.
The minimum level of production at a plant for it to be considered profitable
D.
The level of production for a small sized plant
【单选题】Identify an advantage of adopting a low minimum efficient scale.
A.
It helps companies reduce the level of initial capital required for business.
B.
It allows the firm to accommodate demands for local responsiveness.
C.
It allows firms discount political risks and other global capital risks.
D.
A minimum efficient scale of a plant allows decentralization of production.
【简答题】电阻值为R的一段导线,将它从中间对折,合并成一段新导线,接到电压为20V的电源两端,其阻值为 ,若将电源电压升为40V,其电阻值为 。
【单选题】电阻值为R的一段导线,将它从中间对折,合并成一段新导线,接到电压为20V的电源两端,其阻值为 ,若将电源电压升为40V,其电阻值为 。
A.
0.25R;0.25R
B.
0.25R;0.5R
C.
R;R
D.
2R;R
【单选题】Minimum efficient scale is the output level at which ( ).
A.
long-run average costs are minimized
B.
long-run average costs are maximized
C.
short-run average costs are minimized
D.
short-run average costs are maximized
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