在液体制剂中常添加亚硫酸钠，其目的是
A．调节渗透压B．防腐剂C．抗氧化剂D．助溶剂E．调节pH
参考答案：C
— _______made Daisy wild with joy?
—Her success in the A-level exam this year.
A．How was it that
B．When was it that
C．Why was it that
D．What was it that
诚信通会员目前分为哪两种（）
A.个人版会员
B.商铺版会员
C.其它
D.企业版会员
