单项选择题假如Qx=20-0.5Px+0.1I-2.0Py,物品x和物品y为: A.替代品 B.互不相关 C.低档货 D.互补品
单项选择题物品x的需求方程估计为:Qx=10-2Px+4I-Py,式中,I为人均收入,Py为另一物品的价格。这一方程说明: A.物品x是正常货,物品x和y不相关 B.物品x是低档货,物品x和y为互补品 C.物品x为正常货;物品x与y为互补品 D.物品x为正常货;物品x与y为替代品
单项选择题如果香港影星成龙上了意外事故保险后更多的表演高难度惊险动作,这种现象被称为( )。
单项选择题公共物品的市场需求曲线是消费者个人需求曲线的( )。 A.垂直相加 D.水平相加 C.算术平均数 D.加权平均数
单项选择题W:Don’t talk back to your parents.It’s impolite.M:But they are not reasonable.What did the woman suggest the man to do?()
A.Suggest him not to reply impolitely to his parents.B.Suggest him to refuse to talk to his parents.C.Suggest him to talk his parents down.