【多选题】世界上第一条高速铁路是1964年在 (国家名称)建成的 (线路名称)
【多选题】RFID即无线射频识别技术,以下哪些代表RFID名称?
【单选题】在MGB1420万能磨床晶闸管直流调速系统的主回路中,用整流变压器直接对( )交流电整流。
【单选题】下列物质中既是人体的组成物质,又是人体的供能物质的是 [ ]
【多选题】Which two are true about the tag handler referneed by my Tag. ()
A.
The do Start Tag method is called once.
B.
The do After Body method is NOT called.
C.
The EVAL_Page constant is a valid return value for the do End Tag Method.
D.
the EVAL_BODY_BUFFERED constant is a valid return value for the do Start Tag method.
【单选题】无机盐是微生物生命活动中不可缺少的物质,下列选项中不属于它们的功能的是()。
【单选题】The tag handler for n:recurse extends SimpleTagSupport.Assuming an n:recurse tag can either contain an empty body or another n:recurse tag, which strategy allows the tag handler for n:recurse to outpu...
A.
It is impossible to determine the deepest nesting depth because it is impossible for tag handlers that extend SimpleTagSupport to communicate with their parent and child tags
B.
Create a private non-static attribute in the tag handler class called count of type int initialized to oIncrement count in the doTag method. If the tag has a body, invoke the fragment for that body. Otherwise, output the value of count
C.
Start a counter at 1. Call getChildTags(). If it returns null, output the value of the counter. Otherwise, increment counter and continue from where getChildTags() is called. Skip processing of the body.
D.
If the tag has a body, invoke the fragment for that body. Otherwise, start a counter at 1. Call getParent(). If it returns null, output the value of the counter. Otherwise, increment the counter and continue from where getParent() is called.