A： 氢氧化钠溶液加水稀释
B： 一定压强下，CO2气体在水中的溶解度与温度的变化关系
C： 一定温度下，向饱和的氯化钠溶液中加入氯化钠固体
D： 向生锈的铁钉缓慢滴加稀盐酸
阅读理解，根据短文选择正确答案
It was Saturday yesterday. It rained. We were at home. My mother phoned grandma. Then she washed clothes. My father cooked some noodles and vegetables for lunch. My brother Sam didn't help him. He watched TV. But I helped Dad. I think it will be sunny tomorrow. We will have a picnic in a park. And we will be very happy.
已知抛物线C：y2=2px（p＞0）
