强化食品
参考答案：根据人体生理活动的需要添加一些原料中没有或缺少的营养素。
--- Today or tomorrow?
--- What are you talking about?
--- We are talking about _______ to give a talk on WTO.
A．how
B．where
C．when
D．what
支气管哮喘与心源性哮喘的主要鉴别依据是
A．咳粉红色泡沫样痰B．呼吸困难C．肺部音D．病程长短E．支气管镜检查
