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bootstrap自適應(yīng)表單代碼(bootstrap提供的表單布局類型)
spacebetween分布自適應(yīng)兩邊_中間，兩邊沒(méi)有空隙around中間_兩邊，兩邊會(huì)有空隙1 2 3 4 elrowtype=flexclass=rowbgjustify=center elcolspan=6pclass=gridcontentbgpurplepelcol elcol；boots...