常见的原发性胰腺癌是

A．平滑肌肉瘤

B．腺瘤

C．淋巴瘤

D．导管腺癌

E．以上各项均是

Man: The front tire is flat, and the seat needs to be raised.
Woman: Why not take it to Mr. Smith
Question: What kind of work does Mr. Smith probably do

A．He fixes bicycles.

B．He raises sleep.

C．He sells chairs.

D．He's a gardener.