—According to my grandma，it is a good idea to eat chicken soup when you have a cold.

—________，scientists agree with her.

A．Sooner or later　

B．Once in a while

C．To be exact　

D．Believe it or not

多功能型多媒体演播教室是在简易或标准型配置的基础上，增加一些某种学科教学特殊需要的设备。