下列药物中不能用亚硝酸钠滴定法测定含量者
A．阿司匹林B．对氨基水杨酸钠C．对乙酰氨基酚D．普鲁卡因E．苯佐卡因
参考答案：A
组数值3、6、8、12、34、67、54，求中位数宜选用的公式是（）
33．It was not until one night_____we were doing our cleaning-up I got curious and wanted to see what was on the top floor．
A．that；that
B．when；so
C．that；because
D．when；that
