Thank you for all your hard work last week. I don’t think we ____ it without you.

A．can manage

B．could have managed

C．could manage

D．can have managed

某人因贫血、出血及发热经化验确诊为急性白血病。为何发热

A．出血被吸收
B．缺乏成熟白细胞
C．红细胞破坏太多
D．骨髓被破坏
E．血小板太少