33．It has escaped me    we stopped in the last class．Tom，would you tell me so that I

can go on with my lecture?

A．where it was that

B．that it was when

C．that what it was

D．how it was that

男性，49岁，4小时前，上腹剧烈疼痛。查体：上腹压痛，为明确诊断，下列检查哪项是不必要的（）。

A.心电图

B.血清淀粉酶

C.X线腹部平片

D.肝胆胰B超检查

E.尿淀粉酶