A.两试件磁场相同
B.直径为50mm的棒磁场较强
C.直径为25mm的棒磁场较弱
D.直径为25mm的棒磁场较强
有些方言区的人对韵母en、eng、in、ing的发音有困难,常常区别不清,下列词语读音相混:
试问应该采取什么方法分辨?
考虑到反馈效应,请对以下各种情形做一般均衡分析:
(1)禽流感的爆发对于鸡肉市场和猪肉市场有什么影响?
(2)机票征税的增加对加利福尼亚之类的主要旅游目的地,以及那些旅游地的旅馆有什么影响? .
Using general equilibrium analysis, and taking into account feedback effects, analyze the following:
a. The likely effects of outbreaks of disease on chicken farms on the markets for chicken and
b. The effects of increased taxes on airline tickets on travel to major tourist destinations such as Florida and California and on the hotel rooms in those destinations.