【多选题】() are Marshall’s contribution to IO .
A.
Introduce organization as a fourth factor of production
B.
Touched on the issue of Economies of Scale
C.
Made research for product heterogeneity
D.
Put forward the concept of Workable competition
【单选题】头颅CT横断面可见与鞍上池后外侧角相连的是
【单选题】反映某市7岁男孩身高的分布特征宜用( )
【简答题】读课文,判断下列句子对(√)错(×)。 ( ) 1. Amy's Mum bought a new TV for the children. ( ) 2. The computer is very nice. ( ) 3. Amy wants to buy a book about computers. ( ) 4. The books about computer...
【简答题】性别、年龄这样的概念,可以用来( )。 A .表示个体的特征 B .作为指标来使用 C .表示总体的特征 D .作为变量来使用
【简答题】根据课文,按顺序排列句子。 ( ) Then we put Christmas things on the tree. ( ) Now let's put our gifts under the tree. ( ) Let's invite Danny to help us put up the tree. ( ) First, we put on the ligh...
【单选题】象“性别”、“年龄”这样的概念,可能用来( )
【单选题】The center of the Marshall's economic system is ( ).
A.
production t heory and distribution theory
B.
d istribution theory and consumption theory
C.
p rice theory and distribution theory
D.
p roduction theory and price theory
【简答题】接触网最高工作电压为27.5 kV,短时(5 min)最高工作电压为( )kV,最低工作电压为19 kV。