美股开盘：纳指大跌逾2% 大型科技股齐挫

array(1) { [446373]=> array(2) { [2]=> array(4) { [0]=> string(6) "暴跌" [1]=> string(9) "科技股" [2]=> string(12) "外围股指" [3]=> string(18) "纳斯达克指数" } [4]=> array(1) { [0]=> string(19) "同花顺7x24快讯" } } }