The main axis of national land development: "two horizontal lines and three vertical lines". Of which, two horizontal lines include roads, bridges and ( ).
A、seaside passage
B、along Qinling Mountains-Huaihe River passage
C、along the Yellow River passage
D、along the Yangtze River passage
\n The main axis of national land development: "two horiz - Final Exam - 新结构资源与环境经济学导论 - U校园 | 大学网课搜题引擎