A：明矾可用于水的杀菌消毒
B：炒菜时加碘食盐最好最后放
C：雾霾天气中可以产生丁达尔现象
D：燃料的脱硫和脱氮都是减少酸雨产生的措施
向一定量4%的氢氧化钠溶液中逐滴加入稀盐酸，有关分析错误的是（ ）
求满足不等式组的 {3x−5>1 ①5x−18≤12 ② 整数解.
He fell off the bike and hurt his leg yesterday._______, he had to stay at home for two or three months.
下列说法正确的是（ ）
