药材人参与三七的分泌组织是()
A.油室
B.乳管
C.油细胞
D.油管
E.树脂道
参考答案:E
产生肾性贫血的主要原因
A.1-羟化酶缺乏B.EPO缺乏C.肾素水平升高D.醛固酮水平增高E.继发性甲状旁腺功能减退
Granny looked for her book, but she couldn't find it _____. [ ]
A. somewhere
B. everywhere
C. anywhere
D. nowhere