Was it _____ he was playing volleyball on the playground _____ he got hurt?

A．that; when

B．when; that

C．that; where

D．where; that

下列关于胰腺癌的描述，不正确的是（）。

A.起源于腺管或腺泡细胞

B.大多数肿块边界不清

C.胰头癌以“围管浸润”方式侵犯总胆管

D.常形成 * * 状息肉突入总胆管内

E.胰腺癌较其他肿瘤转移早