当取样量为100ml，用1Cm比色皿测量吸光度时，二乙胺乙酸铜分光光度法测定水中二硫化碳的浓度范围为（）mg/L。
参考答案：0.045－1.46
I know Mr. Shuili; we ______ to each other at an English lecture.
A．were introduced
B．are been introduced
C．are introduced
D．had been introduced
治疗瘾疹湿热蕴肤证，应首选的方剂是（）
A.龙胆泻肝汤合萆薢渗湿汤加减
B.除湿胃苓汤或参苓白术散加减
C.当归饮子加减
D.四物消风饮加减
E.清瘟败毒饮加减
