A:哲学的智慧产生于人类的实践活动
B:哲学是哲学家对自己实践活动的科学总结
C:哲学是指导人们生活得更好的艺术
D:哲学是社会存在和发展的基础
某氏园中,有古木,鹊巢其上,孵卵将雏。一日,鹊徊翔其上,悲鸣不已。顷之,有群鹊鸣渐近,集古木上,忽有二鹊对鸣,若相语状,俄而扬去。未几,一鹳①横空②而来,二鹊亦尾其后。群鹊见而噪,若有所诉。鹳“咯咯”作声,似允③所请。鹳于古木上盘旋三匝④,遂俯冲鹊巢,衔一赤蛇吞之。群鹊喧舞,似庆且谢也。盖二鹊招鹳援友也。
(选自《圣师录》)
【注释】①鹳(ɡuàn):一种凶猛的鸟。②横空:横越天空。③允:答应。④匝:绕一圈。
医务人员工作时采取的许多措施和使用的器材中,包含许多物理知识.下列说法正确的是( )
下面是对《西游记》的简单介绍。请从方框内所给词的适当形式填空,使短文完整。
influence, know, it, everyone, favorite, culture, history, novel
Journey to the West is one of the greatest ____ in China. It has a long ____ in China. It reflected Chinese great ____ The book has enjoyed great popularity among the people and has exerted a tremendous (巨大的) ____ on Chinese minds. Many of the characters and stories in the book ____ to ____ in China, not only including housewives, but also children. ____ writer is Wu Cheng'en. The Monkey King is our ____ character.
用反证法证明命题“设a,b为实数,则方程x3+ax+b=0至少有一个实根”时,要做的假设是( )