铝的密度为2.7×103kg/m3,它的摩尔质量为0.027kg/moL,阿伏加 发布时间:2017-07-06 20:09 │ 来源:www.tikuol.com 题型:问答题 问题: 铝的密度为2.7×103 kg/m3,它的摩尔质量为0.027kg/moL,阿伏加德罗常数为6×1023 mol-1.求体积为0.17m3的铝块中所含的原子数约为多少个?(保留一位有效数字)
题型:问答题 袁某,女,65岁,因肺源性心脏病收住院治疗。护士收集资料时了解到:病人口唇发绀,呼吸困难,食欲缺乏,口腔溃疡,焦虑。应首先执行的护理措施是()。A.与其交谈,解除焦虑B.调节食谱,促进食欲C.通知家属来医院探望D.行口腔护理促进溃疡愈合E.吸氧、缓解缺氧 查看答案
题型:问答题 __________ that it ranks 40 in the world . A. So many talents has Tsinghua University produced B. Such many talents has Tsinghua University produced C. So many talents Tsinghua University has produced 查看答案