A股午评:三大指数集体收涨,超2800只个股飘绿,科创50大涨;半导体板块爆发,多股涨停;通信设备、电脑硬件上涨,油气、医药下跌

Source: https://www.chinanews.com.cn/cj/2026/07-21/10663429.shtml