边际产量曲线与平均产量曲线相交之前有（）
A．总产量为最大值
B．边际产量小于平均产量
C．边际产量等于平均产量
D．边际产量大于平均产量
参考答案：D
请你发挥想象，把下面的三个成语构想成一幅生动的画面，并用文字表述出来。
成语：寒风凛冽 精神抖擞 心旷神怡
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--- Can you tell me when ________ play with me?
--- I can play with you when my homework ________.
A．you will, is finished
B．will you , finishes
C．will you, is finished
D．you will, will finished
