Every family in America has had this sort of experience______there was a price increase of nearly one-third in the past two years

A．that

B．which

C．what

D．when

关于结核病化疗原则，下列哪项不正确（）

A.应坚持早期、联用、大量、规律、全程用药

B.临床有结核中毒症状，X线病灶有炎性成分，需用化疗

C.对病灶部分硬结，可先观察，暂不用化疗

D.吡嗪酰胺对杀灭被吞噬在细胞内的结核菌有效

E.初始病例如条件允许，尽量采用短程化疗（6个月）