YouhaveasimplewebapplicationthathasasingleFrontControllerservletthatdispatchestoJSPstogenerateavarietyofviews.Severaloftheseviewsrequirefurtherdatabaseprocessingtoretrievethe necessaryorderobjectusingtheorderIDrequestparameter.Todothisadditionalprocessing，youpasstherequestfirsttoaservletthatismappedtotheURLpattern/WEBINF/retreiveOrder.dointhedeploymentdescriptor.Thisservlettakestworequestparameters，theorderIDandthejspURL.IthandlesthedatabasecallstoretrieveandbuildthecomplexorderobjectsandthenitdispatchestothejspURL.WhichcodesnippetintheFrontControllerservletdispatchestherequesttotheorderretrievalservlet？（）
YouhaveasimplewebapplicationthathasasingleFrontControllerservletthatdispatchestoJSPstogenerateavarietyofviews.Severaloftheseviewsrequirefurtherdatabaseprocessingtoretrievethe necessaryorderobjectusingtheorderIDrequestparameter.Todothisadditionalprocessing，youpasstherequestfirsttoaservletthatismappedtotheURLpattern/WEBINF/retreiveOrder.dointhedeploymentdescriptor.Thisservlettakestworequestparameters，theorderIDandthejspURL.IthandlesthedatabasecallstoretrieveandbuildthecomplexorderobjectsandthenitdispatchestothejspURL.
WhichcodesnippetintheFrontControllerservletdispatchestherequesttotheorderretrievalservlet？（）
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通常h—d图由t、h、d和Φ4组等值线和一条水蒸气分压线构成。 A．错误B．正确