A公司4月15日签发一张为期90天的商业汇票。该汇票的到期日应为（）。 ["7月13日","7月14日","7月15日","7月20日"]
Your network uses IPv4. You install a server that runs Windows Server 008 at a brach office. The server is configured with two network interfaces. You need to configure routing on the server at the branch office. Which two actions should you perform？（） [" Install the Routing and Remote Access role."," Run the netsh ras ip set access ALL command"," Run the netsh interface ipv4 enable command"," Enable the IPv4 Router Routing and Remote Access optio"]
一个好的教育实验的基本特征是什么？
保险深度
管理信息系统阶段为20世纪（）
层析分离
