简述牡丹与芍药的形态区别。
参考答案:
请根据下面提示,写一篇短文,词数不少于50.
In your spoken Endlish class, your teacher shows you the following picture. You are asked to describe the picture and explain how you understand it.
所谓信息化,是指社会经济的发展从以物质与能量为经济结构重心,向以______为经济结构重心转变的过程。
A.计算机产业
B.计算机软件
C.网络信息
D.信息与知识