药品集中招标采购
参考答案：药品集中招标采购：指多家医疗机构采用招标采购方式以相同的价格购买药品和伴随服务的行为。
毒品冰毒为芳香族化合物，分子中只含有碳、氢、氮三种元素，相对分子质量不超过150，碳元素和氢元素的质量分数之和为90.6%。请按要求填空：
冰毒的摩尔质量为______，分子式为______。
Most of us know we should cut down on fat, but knowing such things isn't much help when it
shopping and eating. [ ]
A. refers to
B. speaks of
C. focuses on
D. comes to
