The girl is old enough to look after .[ ]
A. yourself
B. himself
C. herself
D. myself
C
患者,女性,进行性吞咽困难2年,持续胸背痛3月,CT检查发现食管肿瘤已外侵。
食管癌术后行放疗,血小板90×10/L,此时决定治疗是否停止的指标是白细胞计数低于()
A.1×109/L
B.2×109/L
C.3×109/L
D.4×109/L
E.5×109/L
轨道停电故障恢复供电时是怎样防止进路错误解锁的?