下列哪项是诊断缺铁最肯定的依据
A．有慢性失血史B．血涂片见典型小细胞低色素性红细胞C．转铁蛋白饱和度降低D．骨髓小粒可染铁消失
参考答案：D
______ Chief Engineer, as his family had expected, made his father happy and proud.
A．Mike being appointed
B．Mike’s appointed
C．Mike appointing
D．Mike’s being appointed
肾脏调节酸碱平衡不依靠
A．远曲小管和集合管泌K+
B．近曲小管对HCO3ˉ的重吸收
C．远曲小管和集合管泌氨
D．远曲小管和集合管泌H+
E．髓袢重吸收Na+
