You have a use case in your web application that adds several session-scoped attributes. At the end of theuse case， one of these objects， the manager attribute， is removed and then it needs to decide which of theother session-scoped attributes to remove. How can this goal be accomplished？（） ["The object of the manager attribute should implement the HttpSessionBindingListener and it should call the removeAttribute method on the appropriate session attributes.","The object of the manager attribute should implement the HttpSessionListener and it should call the removeAttribute method on the appropriate session attributes.","The object of the manager attribute should implement the HttpSessionBindingListener and it should call the deleteAttribute method on the appropriate session attributes.","The object of the manager attribute should implement the HttpSessionListener and it should call the deleteAttribute method on the appropriate session attributes."]
网页设计时应考虑哪些问题？
在实施调查过程中，最重要的管理者是（）。 ["访员","督导员","项目主管","公司最高领导者"]
产权
网站规划时应该考虑哪些问题？
在Internet上传输电子邮件是通过哪些协议来完成的？这些协议的主要作用是什么？
