正常时,apoA-I与apoA-Ⅱ之比为()
A.1:1
B.2:1
C.3:1
D.4:1
E.5:1
参考答案:C
The repair work may take us a long time,but it’s worth trying.
A.besides
B.otherwise
C.anyhow
D.except
论述学习动物营养学的意义。