____ is known to us all is that the Chinese government has spared no efforts to protect people

from fake food.[ ]

A. As

B. It

C. That

D. What

图形交互式自动编程系统在运行过程中，屏幕可同时出现工件的（）视图，并有刀具切削过程实体图。具有形象、直观等优点。

A.立

B.俯

C.三

D.多个