①航线②是哥伦布开辟的
②航线③证明了地圆学说的正确性
③新航路开辟后世界开始连成一个整体
④新航路开辟后太平洋沿岸工商业经济迅速繁荣
A:①②
B:②③
C:②③④
D:①③④
—Many people in big cities cannot enjoy life even though they have houses, cars and ideal jobs.
—Sub-health may partially ______ it.
下列四个成语中,不出自淝水之战的是( )