用于分离人凝血因子VIII的血浆，保存期自血浆采集之日起不超过（）年。
A.1
B.2
C.3
D.半年
参考答案：A
—Now, people's life in Hengyang is ______ than before.
—Yes. Many people have their own cars. [ ]
A. much better
B. less better
C. more better
起落架位置指示灯位于（）
A.P1板
B.P2板
C.P3板
D.P5板
