Do you have any idea _____ is actually going on in the classroom? [ ]

A. that

B. what

C. as

D. which

神经型食物中毒临床表现正确的是（）

A.腱反射可呈对称性减弱

B.肌力低下主要见于颈部及肢体近端

C.婴儿首发症状为便秘

D.起病急，以神经症状为主

E.死因多为延髓麻痹