鼠疫的微生物学检查，下列哪种标本不能检出病原菌

A．淋巴结穿刺液

B．血液

C．病人粪便

D．病人痰液

E．尸体的肝、脾、肺等组织

In _________ 1990’s, he was still so poor ________ student that nobody could imagine how rich he would be in the future.

A．/; a

B．the; a

C． /; /

D．the; /