伏羲氏对周易的主要功绩是（）
A.河图
B.洛书
C.先天八卦
D.后天八卦
参考答案：C
Lucy: Does Aunt Tara enjoy ______?
Mark: Yes. She has three dogs, two rabbits, four birds, and some fish in her house. [ ]
A. collecting dolls
B. keeping pets
C. visiting the zoo
D. working on the farm
用于DIC的早期诊断（）
A．血清K+↑
B．血清Cl-↑
C．血清Na+↑
D．血清C1-↓
E．血清K+↓
