题目内容

单位预留银行签章变更，认真审核单位提交的申请变更公函是否写明（）

A. 变更原因
B. 新签章启用日期
C. 并加盖与原预留银行签章有明显区别的新签章
D. 是否在公函上注明必须交回盖有旧签章的空白重要凭证种类、数量、编号等资料等

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