The man ____________ blue is his brother.[ ]
A. with
B. in
C. on
D. at
答案:B
可引起血便的疾病有()。
A.内痔
B.血栓性外痔
C.肛裂
D.骨盆直肠窝脓肿
E.直肠息肉
胰岛素制剂有几种?如何选用?