The knowledge and power of the Information Age will be within reach not just of the few,____of every classroom,every library in the near future
选but,是not..but..的句型,意思是不仅..而且..
本句意：将来信息时代的知识＆力量不仅掌握在少数教室＆图书馆手上,同样也在每一间教室＆图书馆的掌握中