吸收铁的最主要部位是
A. 胃底部
B. 胃窦部
C. 小肠上部
D. 回肠
E. 结肠
胃大部切除术后出现贫血主要是由于减少了
A. 主细胞
B. 壁细胞
C. 粘液细胞
D. G细胞
E. S细胞
But coronary arteries can become blocked usually by a buildup of cells, fat and __________(1 word) which is called plaque.
The heart needs blood and the oxygen the nutrient carries to _________________ (2 words).