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【单选题】
You can check your e-mail by yourself，but owning an e-phoneA.
you can know the arrival of an e-mail immediately．
B.
you can check your e-mails more quickly．
C.
you can depend on the e-phone to check per day．
D.
can help you delete unnecessary e-mails．
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【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 [ ]
A.
水、无机盐、维生素
B.
蛋白质、糖类、脂肪
C.
无机盐、蛋白质、糖类、脂肪
D.
蛋白质、糖类、脂肪、维生素
【单选题】在MGB1420万能磨床晶闸管直流调速系统控制回路中,V36的基极加有通过RV13来的正向直流电压和由变压器TC1的二次线圈经V6、( )整流后的反向直流电压。
A.
V12
B.
V21
C.
V24
D.
V29
【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】The tag handler for n：recurse extends TagSupport.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 TagSupport 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.
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