You    scold such a pupil who always keeps silent so seriously that you      hurt him.

A．should, can

B．may, will

C．mustn’t , may

D．can’t ,must

下列检查对区别急性单纯性胰腺炎和坏死型胰腺炎最有价值的是：（）

A.B超

B.CT

C.腹部平片

D.血淀粉酶检查

E.胸片