The _______ girl sat in the corner________.

A．frightening; cried

B．frightening; crying

C．frightened; crying

D．frightened; to cry

真性与继发性红细胞增多症的鉴别中不必考虑的是()

A．是否病毒感染后

B．是否红细胞生成素增多

C．是否血小板增高

D．是否红细胞高于正常

E．中性粒细胞碱性磷酸酶是否增高