单项选择题 WhichHTTPmethodhasthecharacteristicthatmultipleindentialrequestsmayproducesideeffectbeyondthoseofasinglerequest（）？

多项选择题 ForagivenServletResponseresponse，whichretrievesanobjectforwritingbinarydata？（）

单项选择题 Which additions needs to be made to the Iterate Handler class for it to properly perform as the tag handler for the loop tag.?()