“涌潮”现象是指A.土鳖虫发霉B.麝香走气C.牡丹皮变色D.山药生虫E.蜂蜜发酵 发布时间:2017-12-31 09:55 │ 来源:www.tikuol.com 题型:单项选择题 问题: “涌潮”现象是指A.土鳖虫发霉B.麝香走气C.牡丹皮变色D.山药生虫E.蜂蜜发酵
题型:单项选择题 现有某种硝酸铵化肥样品,经实验测定该样品中氮元素的百分含量为38%,若只混入了一种其他物质,问则可能混入了下列何种物质( )A.NH4ClB.(NH4)2SO4C.CO(NH2)2D.NH4HCO3 查看答案
题型:单项选择题 —Did you hear any strange _______ when the quake happened? —No, I was in my garden with my flowers and was enjoying the beautiful _______ of my birds at that time. [ ]A. voice; noise B. noise; sound C. whisper; soundD. sound; voice 查看答案