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- 1集合U={0,1,2,3,4,5},A是U的子集,当x属于A时,若有x-1不属于A,则称x为A的一个“孤立元素”,求U的子集中
- 2食堂有一批煤,计划每天烧105千克可以烧30天.改进烧煤技术后,每天烧煤90千克,这批煤可以多烧多少天?
- 3侍中侍郎郭攸之、费祎、董允等,此皆良实,志虑忠纯,是以先帝简拔以遗陛下.愚以为宫中之事,事无大小,悉以咨之,然后施行,必能裨补阙漏,有所广益.
- 4Newton's second laws of motion
- 5Christmas eve is on______every year
- 6do you know everyone ----came to the part? almost,but I do not know the one----you talked with.
- 7计算器计算结果(1.845E+19)中的E代表什么?
- 8"My father and mother often tell me that 'please' and 'thank you' ( )nice words"括号里填什么?
- 92g氢气与8g的氧气反应生成10g水,为什么不符合能量守恒定律?
- 10thank you for the trouble you will have to take for