△+○=20
△=○+○+○+○
△=____
○=____
遵守社会公德,是公民的个人修养,也是社会文明进步的标志。( )
厚德成人 博学成才
思想是人类最美丽的花朵。辨别下列史实的正误,并加以改正。
—People now can know what is happening in the world quickly. —You're right.With the help of computers,news can ___every corner of the world.