NSAID急性胃炎主要发病机制

A.胃黏膜微循环障碍

B.抑制前列腺素合成

C.亲脂性，破坏黏膜屏障

D.黏液屏障分泌减少

E.胆盐、磷脂酶A和其他胰酶破坏

       you may have, you should gather your courage to face the challenge.

A．However a serious problem

B．What a serious problem

C．However serious a problem

D．What serious a problem