第9章 评级
if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"if（（"standalone"downavigator）&&downavigatorstandalone）{doriteln（"