CMP规定,厂房的合理布局主要按
A.领导意图和专家意见
B.生产工艺流程及所要求的空气洁净级别
C.生产厂长的生产工作经验
D.采光和照明
E.周边环境
参考答案:B
—Now computers ____ everywhere.
—I agree with you. I think they are the most useful inventions.[ ]
A. are using
B. use
C. are used
D. will use
在蒸发皿中加热蒸干并灼烧下列物质的溶液可以得到该物质的固体的是[ ]
A.Na2SO4
B.NH4HCO3
C.FeCl3
D.Ca(HCO3)2