The parents the Council is now going&n-考呗网题库移动版

单选题
The parents the Council is now going to contact are those__________

A．who had not yet answered letters
B．who didn't want to pay
C．whose children stayed away from school
D．who had asked about transport before

参考答案D

解析:
根据最后一段最后一句“parents who in the past had asked if transport could be pl"Ovided for their children”可知答案为D。

单选题“搭便车”现象是对下列( )的一种形象的比喻。

A．社会福利问题
B．市场失灵问题
C．公共物品问题
D．以上都是

单选题
社会福利不可能再得到增进的一种状态是( )。

A．帕累托改进
B．帕累托最优
C．局部均衡
D．市场效率

单选题
如果商品X对于商品Y的边际替代率MRSxy小于X和Y的价格之比Px／Py，则( )。

A．该消费者应减少X消费，增加Y消费
B．该消费者应增加X消费，减少Y消费
C．单位货币购买X带来的边际效用大于单位货币购买Y带来的边际效用
D．该消费者获得了最大效用