A:喝了汽水会打嗝,说明压强减小气体的溶解度减小
B:住房失火,消防队员用水扑灭,是为了降低可燃性的着火点
C:常见的铁合金有生铁和钢,其中钢的含碳量较高
D:发现家中的燃气泄漏时,要立即关闭燃气阀门并打开门窗通风
--I think it's really necessary. It is reported that the food that Chinese people
every year is enough to feed 200 million people for a year.
郭靖和杨康是金庸小说《射雕英雄传》中两个重要人物。你知道他们的名字与以下哪一事件有直接的联系( )