食品经营者不得以隐瞒真实情况或者提交虚假材料申请或者取得食品流通许可。
参考答案:对
某课外活动小组为了测定铜铁合金中铁的质量分数,现取铜铁合金样品20.0g,将80.0g稀硫酸平均分成4份,分4次逐渐加入到样品中,每次充分反应后测得剩余固体质量见下表
试求:
①20.0g铜铁合金中,铜的质量为 _________ g.
②铜铁合金中,铁元素的质量分数为_________.
③20g稀硫酸溶液中溶质质量.
Which of the following nursing diagnoses would be most appropriate when teaching the mother of a toddler()
A. Activity intolerance.
B. Risk for injury.
C. Delayed growth and development.
D. Impaired mobility.