临床上不引起便血的肛肠疾病是：（）
A.内痔
B.肛裂
C.直肠脱垂
D.肛瘘
E.血栓外痔
参考答案：E
若集合A={x|x2-2x＜0}，B={x|y=lg（x-1）}，则A∩B为______．
— _____ is it?
— It's five yuan. [ ]
A. How many
B. How soon
C. How much
D. How old
