炽灼残渣检查时,一般炽灼温度是
A.Ag(DDC)吡啶试液B.砷斑C.白田道夫法D.微孔滤膜法E.过硫酸铵
参考答案:C
–What should I do first?
--The instructions _________ that you should mix flour with water carefully first.
A.say
B.tell
C.write
D.go
下列哪项不属于粉碎的方法()。
A.低温粉碎
B.闭塞粉碎和自由粉碎
C.高温粉碎
D.开路粉碎和闭路粉碎