Many people are wondering ________.  

A．whether is the meat from the lab bad for their health

B．whether the meat from the lab is bad for their health

C．whether is bad for their health the meat from the lab

D．whether from the lab the meat is bad for their health

在知觉的定义中应排除（）

A.是客观事物直接作用于感官，在头脑中产生的对事物的整体反映

B.是在感官获得信息的基础上对事物进行解释的过程

C.是对感官获得的感觉信息进行叠加的过程

D.是对输入的感觉信息的组织与解释

E.存在自下而上的加工和自上而下的加工