It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.

A．other than

B．or rather

C．rather than

D．more than

药用部位为菌核的中药材为（）

A.茯苓

B.灵芝

C.冬虫夏草

D.松萝

E.猪苓