营养性缺铁性贫血选用下列哪项治疗最恰当
A.硫酸亚铁加维生素C加高蛋白饮食
B.维生素C加叶酸
C.维生素B12加高蛋白饮食
D.硫酸亚铁加叶酸
E.以上都不是
参考答案:A
A hydrostatic release mechanism for a liferaft().
A.must be wet before it will release
B.should be kept in a watertight except in an emergency
C.will inflate the raft in its cradle if operaterd manually
D.must be submerged to a certain depth to release automatically