治疗气血两虚再生障碍性贫血，应首选的方剂是（）
A.归脾汤
B.四物汤
C.八珍汤
D.当归补血汤
E.补中益气汤
参考答案：C
The first decade in the 21st century is the one ______ many significant advances are made in China.
A．that
B．in which
C．which
D．where
5-羟色胺主要存在于（）
A.嗜酸性粒细胞
B.淋巴细胞
C.单核巨噬细胞
D.肥大细胞
E.血管内皮细胞
