某患者在胃大部分切除后出现巨幼红细胞性贫血的原因是对哪项物质吸收障碍( )
A．蛋白质B．叶酸C．维生素B12D．脂肪E．铁
参考答案：C
U8供应链管理主要是适用工业企业使用的一套完整的管理方法，不适用商业企业使用。
How can rescue personnel detect that a SART is transmitting in the immediate vicinity?（）
A.The SART's blips on the PPI will begin arcing and eventually become concentric circles
B.The DSC unit will react to the SART's signal and respond with the two-tone alarm
C.The SART can provide an approximate location to within a two nautical mile radius，per IMO standards
D.The SART signal appears as a target which comes and goes; the effect of heavy swells on a SART
