长期发热的患者，诊断伤寒最可靠的依据是（）
A.玫瑰疹
B.脾肿大
C.肥达反应阳性
D.血嗜酸粒细胞减少
E.血培养阳性
参考答案：E
青蒿功善退热，但不宜用于
A．暑湿发热B．温病余热C．中暑发热D．肌表之热E．阴虚发热
A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability that the sum of the three numbers on the balls selected from the box will be odd
