老年人大量饮酒可引发酒精中毒,容易导致缺乏的营养素为()。 ["糖类","脂肪","钙","磷","维生素E"]
题9图所示空心变压器AB间的输入阻抗为()Ω。 ["j15Ω","j5Ω","j20Ω","j11.25Ω"]
从挥发油的乙醚溶液中分离羧酸类成分,应加() ["A.氢氧化钠","B.盐酸","C.Giarad试剂","D.邻苯二甲酸苷","E.碳酸氢钠"]
短肠综合征营养支持的顺序是() ["肠外营养、要素膳、整蛋白膳食","要素膳、肠外营养、整蛋白膳食","整蛋白膳食、肠外营养、要素膳","肠外营养、整蛋白膳食、要素膳","要素膳、整蛋白膳食、肠外营养"]
由3个异戊二烯单元聚合而成的是() ["A.单萜","B.倍半萜","C.二萜","D.三萜","E.四萜"]
国际价格