床层按（）分层层次清楚，这说明风水及给料相适宜 ["A、数量","B、密度","C、质量","D、粒度"]
飞行员膳食中脂肪提供能量的适宜比例为（） ["10％～15％","15％～20％","20％～25％","25％～30％","20％～35％"]
伤寒的治疗首选（） ["青霉素","氯霉素","四环素","环丙沙星","庆大霉素"]
流行性斑疹伤寒的主要传播媒介（） ["家鼠","鼠蚤","体虱","病人","恙螨"]
某老年人全日应摄入总能量1800kcal，则其每日可食用脂肪（） ["60g","80g","70g","50g","30g"]
简述进行审核与修订采购计划的步骤。
