某市制鞋工人工资率为每小时40元，该市制鞋工人的劳动力总供给人数为2万人，当工资率提高到每小时50元/时，该市制鞋工人的劳动力总供给人数上升到3万人，则该市制鞋工人的劳动力供给是（）。
A.缺乏弹性的
B.富有弹性的
C.单位弹性的
D.无弹性的
参考答案：B
解析：
本题考查供给弹性。供给弹性＝劳动工时变动%/工资率变动%
＝（工时增加或减少绝对数量/初始工时）%/（工资率上升或下降绝对数量/初始工资率）%
=(20000-30000)/20000/(40-50)/40=2，劳动力供给弹性大于1，称之为劳动力供给曲线富有弹性。
考点:劳动力供给理论
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