I have a book. _____ name is Harry Potter. [ ]
A. its
B. It's
C. Its
D. it
答案:A
肝硬化病人容易发生凝血障碍的主要原因是()
A.血小板减少
B.维生素K缺乏
C.凝血因子Ⅲ缺乏
D.某些凝血因子缺乏
E.血液中抗凝物质增加
什么是渗流流动?