二氧化碳饱和溶液的pH=5.6,酸性比其强的雨水称为酸雨。一场雨后从A地测得雨水的pH=4,B地测得雨水的pH=6.6,则()
下列实验操作正确的是( )
I'm not sure how much scholarship you will receive, but it will roughly __________your major expenses.