A：加水稀释2倍后，两溶液的pH均减小
B：使温度都升高20℃后，两溶液的pH均不变
C：加适量的醋酸钠晶体后，两溶液的pH均增大
D：加足量的锌充分反应后，盐酸产生的氢气比醋酸多
—Yes. I ________there for half a month last summer holiday.
As we grow up, it always _______ that after we give something up, we gain something new in its place. （ ）
