有甲、乙两根长度相同的色谱柱,测得它们在范第姆特方程式中的各项常数如下:甲柱:A=0.07cm,B=0.12cm2·s-1,C=0.02s;乙柱:A=0.11cm,B=0.10cm2·s-1,C=0.05s。求:
查看答案
在一个3m长的色谱柱上,分离一个样品结果为t0=1min,tR1=14min,tR2=17min,Y2=1min。计算:
()也称会计反映,是以货币为主要计量尺度,对会计主体的资金运动进行的反映。
A. 会计控制
B. 会计监督
C. 会计核算
D. 会计对象
A.New laws are yet to be made to reduce pollutant release.B.Pollution has attrac
A. New laws are yet to be made to reduce pollutant release.
B. Pollution has attracted little attention from the public.
C. The quality of air will surely change for the better.
D. Itll take years to bring air pollution under control.
A.He will help the woman with her reading.B.The lounge is not a place for him to
A. He will help the woman with her reading.
B. The lounge is not a place for him to study in.
C. He feels sleepy whenever he tries to study.
D. A cozy place is rather hard to find on campus.