为什么要用水盾来灭火?这是利用气压改变火焰方向来保护消防员。 #科普 #解压 #消防员 #物理 | 8k8 vip | Updated: 2024-07-19 05:11:14
KYIV - Several explosions were heard on Wednesday morning in the Ukrainian capital, as Russia launched missile attacks against the country.
The Kyiv city military administration said air defense is operating in the city.