Can you __me a job when I get there?You know ,I have to work in order to pay for my schooling.A applyB arrangeC provideD guaranteekey D提供工作不可以吗？[ 本帖最后由 雅姿 于 2008-5-4 20:35 编辑 ]

半径为4的球面上有ABCD四点，且AB，AC，AD两两互相垂直，则ABC、ACD、ADB面积之和最大值为

向1L硫酸和硫酸钠的混合溶液中加入3L 5*10^-5mol/l Ba(OH)2的稀溶液时，沉淀达最大量，从所得溶液中取出4mL并加水稀释至20mL，测得溶液的pH=7,则原硫酸与硫酸钠混合溶液的PH为？其中硫酸钠的物质的量浓度为？

The size of a canal bulids the kind of boats going through it.中bulids译为？

They are a reminder not only of that part of us that is hungry,but also of that part of us that needs to give in order to be whole.