某种水溶液,易在酸性条件下降解,为防止其氧化,常向其水溶液中通入
A.CO2
B.空气
C.N2
D.NH3
E.均有可能
参考答案:C
—Oh, the new school uniform looks ugly! I don't like the color!
—_________. I think the uniform is out of style! And girls should wear skirts _________ pants! [ ]
A. Me, neither; instead of
B. Me, too; instead of
C. Me, neither; without
D. Me, too; without
将标准系列溶液测得的吸光度值对六价铬含量作图,即得标准曲线。