Crohn病主要侵袭肠壁的
A.黏膜层B.全层C.肌层D.浆膜层E.黏膜下层
参考答案:B
Julia is very clever.In fact,I doubt whether anyone in the class has_______ IQ.
A.a high
B.a higher
C.the higher
D.the highest
磨机减速机起动前操作要求是什么?