Studentswillusecompu的精选

问题详情：RiddihShah,10     Studentswillusecomputersande-textbooks.E-textbookswillbelikeadisk(硬盘).Soinsteadofcarryinglotsofheavytextbooks,studentswillonlycarryafewdisksandreadbooksfromthem.Learni...