为保障公民临床急救用血的需要，国家提倡并指导择期手术的患者
A．率先献血
B．互助献血
C．自愿献血
D．自身储血
E．同型输血
参考答案：D
The little boy still needs the________20 dollars to do with some things________.
A．remaining；remained to be settled
B．remaining；remaining to be settled
C．remained；remained to settle
D．remained；remaining to settle
不属于传染病的发展阶段的是（）
A.潜伏期
B.最长潜伏期
C.前驱期
D.症状明显期
E.恢复期
