下列化学用语正确的是 A.乙烯的比例模型: B.HClO的结构式为:H—Cl—O 发布时间:2017-05-11 22:00 │ 来源:www.tikuol.com 题型:选择题 问题: 下列化学用语正确的是A.乙烯的比例模型:B.HClO的结构式为:H—Cl—O C.H2O2的电子式:D.乙醇的分子式:CH3CH2OH
题型:选择题 某化肥厂甲、乙两个车间包装肥料,在自动包装传送带上每隔30min抽取一包产品,称其重量,分别记录抽查数据如下:甲:86、72、92、78、77; 乙:82、91、78、95、88(1)这种抽样方法是哪一种?(2)将这两组数据用茎叶图表示;(3)将两组数据比较,说明哪个车间产品较稳定. 查看答案
题型:选择题 I ______ to donate a large sum of money to you sooner but I didn't know that your nonprofit hospital was in trouble.[ ]A. had come B. was coming C. would come D. would have come 查看答案