[多选]
You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once.
Which three are possible mechanisms for performing this initialization code？（）

A . In the init method.
B . In the jspInit method.
C . In the constructor of the JSP’s Java code.
D . In a JSP declaration， which includes an initializer block.
E . In a JSP declaration， which includes a static initializer block.

请对NTFS文件C：\abc.txt设置NTFS权限，允许用户账户user1对其具有“读取（允许）”和“写入（允许）”权限。操作步骤：步骤1：在Windows资源管理器窗口中右击文件“C：\abc.txt”→（）→（）选项卡。步骤2：单击【编辑】按钮，然后在弹出的窗口中单击【添加】按钮。步骤3：在“选择用户、计算机、服务账户或组”窗口中输入用户账户（），然后单击【确定】按钮。步骤4：在“abc.txt的权限”窗口中，给user1分配（）权限，然后单击两次【确定】按钮。 A.user1 B.属性 C.“读取（允许）”和“写入（允许）” D.安全 E.安全属性 F.权限根据抗剥落性及冻融劈裂强度试验结果，沥青混合料粉胶比控制在（）较为适宜。 1.5～2。 2～3。 1～1.3。 0.5～0.7。预备党员因还不是党的正式成员，还处于被教育考察阶段，在党内没有表决权、选举权和被选举权，对党内生活尚不熟悉，不能担任入党介绍人。（）计算机系统中的信息资源只能被授予权限的用户修改，这是网络安全的（）。保密性。数据完整性。可利用性。可靠性。 20世纪推动和制约世界人文社会科学发展的背景因素有哪些？

You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once.
Which three are possible mechanisms for performing this initialization code？（）

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[多选] You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once. Which three are possible mechanisms for performing this initialization code？（）

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[多选]
You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once.
Which three are possible mechanisms for performing this initialization code？（）