以下杂质检查方法所用的试剂是
砷盐的检查
A．氯化钡试液B．酸性氯化亚锡试液C．硫酸D．硫氰酸铵溶液E．硫酸肼溶液
参考答案：B
Mary forgot（）a letter to her mother, so she wrote to her just now.
A.writing
B.to write
C.to have written
股东大会有权审议批准公司的年度财务预算方案、决策方案。( )
