—Must I wait here now?

—No,you                  .You may come back in half an hour. [ ]

A. mustn't                

B. can't

C. needn't                

D. don't

急性胃肠功能障碍诊断依据中，下列错误的是（）。

A.腹部胀气

B.肠鸣音减弱

C.麻痹性肠梗阻

D.应激性溃疡

E.脓毒症