A Welcome Gift Dario and his mother loved their new apartment. The living room was large enough for their piano. That night, the two of them 1side by side at the piano. They played jazz music to
（2010·黑龙江大庆实验中学高三第二次月考）25. There was a time in the USA when the money spent on educating a black child was just one fourth of _____ spent on each white child. A. i
3CO2＋4H2O，则x的数值为( )