解决我国水资源短缺问题的根本出路是（      ）

下列语句所指的文学家，依次是（     ）

①漱玉集中，金石录里，文采有后主遗风    ②浔阳千尺水，勾留江上别离情

③铁板铜琶，继东坡，高唱大江东去        ④幽愁发愤，著成信史照人寰

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由4个相同的小立方体搭成的几何体如图所示，则它的主视图是（　　）

    Spring in Nanjing is very short .It is warm and sunny .People (人们) like to go to the parks on sunny days . It is very hot in summer in Nanjing .People do not like to play balls in the afternoon .They like to go swimming in summer . In autumn , it is cool and sunny. Many people like to come to Nanjing in autumn .In winter , it is cold in Nanjing .Boys and girls like to make snowmen and go skating . They have great fun in winter .