A:5.64
B:7.54
C:5.74
D:57.4
某温度下,体积和pH都相同的盐酸和氯化铵溶液加水稀释时的pH变化曲线如图所示,下列判断正确的是( )
My parents want to go _____________ on vacation, they are so tired these days.
I know you're busy these days, but you'd better ___________ off today's work till tomorrow.