【单选题】The example of a bird sleeping in front of a mirror indicates that _________.
A.
the phenomenon of birds dozing in pairs is widespread
B.
Birds prefer to sleep in pairs for the sake of security
C.
even an imagined companion gives the bird a sense of security
D.
a single pet bird enjoys seeing its own reflection in the mirror
【判断题】厂商实现利润最大化的均衡条件是边际收益等于边际成本
【判断题】厂商实现利润最大化的均衡条件是边际收益小于边际成本
【简答题】Happy birthday! Do birthday really make people happy? Of course they do.Birthday celebrate the day when we were born.Besides, that extra candle on the cake suggest another year of growth and maturity(...
【单选题】厂商利润最大化(亏损最小化)的条件是边际收益()边际成本。
【单选题】Why do you _____? [ ]
C.
so much like your birthday
D.
like your birthday so much