A:AgCl沉淀生成和溶解不断进行,但速率相等
B:AgCl难溶于水,其溶液中没有Ag+和Clˉ
C:升高温度,AgCl沉淀的溶解度不变
D:向AgCl沉淀中加入NaCl固体,AgCl沉淀的溶解度不变
一质点在0~15s内竖直向上运动,其加速度﹣时间变化的图象如图所示,若取竖直向下为正,g取10m/s2,则下列说法正确的是( )
读印度农作物分布示意图,印度农作物分布具有明显的区域性,这种区域分布的主要依据是( )
---Our teacher is always kind.
---Yes. When she asked me to answer her question yesterday, I gave a wrong answer at first. She _______me to try again.