It was the training      he had as a young man     made him such a good engineer.

A．what; that

B．which; that

C．that; which

D．that; what

应诊断为

A．庆大霉素过敏反应

B．庆大霉素肾中毒，导致急性肾衰

C．双输导管结石梗阻

D．前列腺肥大

E．原发病导致失水