搜题请搜索小程序“爱下问搜题”
问题 单项选择题

用来体现经济变量与时间的变化关系的经济数学的内容为( )。

A．几何代数

B．线性代数

C．多元微分方法

D．采用微分方程或差分方程

答案

参考答案：D

阅读理解
读下面短文，按要求完成各项任务。
Joe     In 100 years, the world will be great. Robots will do all the dull jobs
and make delicious food for us. Robots will also clean our rooms and
wash our clothes. Our life will be very interesting. We will travel around
the world to visit our friends. The weather will always be nice. Transport
will be cheaper. It will be fun!
Tina      In 100 years, the world will be dull. The weather will be hot all the year. Paper
will be expensive because there won't be any trees. There won't be any fish in the
sea, and there will be strong winds. Transport will be very expensive, so people will
not travel . It will not be much fun!
In 100 yearsJoe's opinions Tina's opinions
The world 1_______  2_______ 
Weather 3_______  4_______ 
Transport cheaper 5_______ 
查看答案
多项选择题

第三方物流的主要特征包括( )。

A．以现代信息技术为基础

B．提供合同导向的系列化服务

C．侧重于提供个性化物流服务

D．外包只限于一项或数项独立的物流功能

E．物流企业之间是动态联盟关系
查看答案