风雪中的坚守
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辛弃疾的诗
王安石写过( )一天,苏东坡去拜访他,问:
(a-b)+(-2a-b)=?(x+y-z)+(x-y+z)-(x-y-z)=?
战斗机发动机是直接烧油 产生推力吗
因式分解x(a-b)+y(b-a)-z(a-b) (a-3)-(2a-6)
(-2a-b)②-(-2a+b)(-b-2a) (x-y+z)(-x+y+z)+(x-y)②其中z=-1注:②是 假设1的平方=1② 急,希望大家给力,在一个小时之内完成,
已知数组a=(-1,3,x),b=(y,2,3),c=(0,z,5),若2a+b=c,求x,y,z的值.
如果x,y,z∈R,且x+y+z=a(a>0),x^2+y^2+z^2=a^2/2,求证0≤x≤2a/3,0≤y≤2a/3,0≤z≤2a/3.
猫头鹰的天敌是什么?我觉得他没有天敌他是猛禽,要有也是人
田鼠天敌是什么?
猫头鹰天敌是什么?
only 11 people ______the shipwreck.survived after 获救 survived through安然度过 为什么都不能用 只能用survived
猫头鹰的天敌回答—人——的可以去死了 在央视不知道几台 看过 有只猫头鹰被天敌攻击的录像 也是猛禽 叫什么忘了 知道的朋友说下别说没有天敌之类的话 了
猫头鹰的天敌是什么啊?
★★2个初二英语适当形式填空★★急There was a terrible acdident on the road last night,and ___(luck) two men were killed.The old building in our town has stood there for ____ (century).
我想要一些蜂蜜和苹果用英语怎么说
急,为啥叫东周西周,东汉西汉,而不叫南周北周呢?而北宋南宋就是南北!
为什么先由“西周”再是“东周”,先是“西汉”再是“东汉”?
effort作啥解释是可数啥解释是不可数?
填有含字母的式子钢笔的单价是圆珠笔的3.6倍,圆珠笔每支x元.钢笔每支是 元;钢笔比圆珠笔每支贵 元.
effort可数吗?
effort是什么意思?
Peter always feels tired.What's wrong with_____?A he B himself C his D him
Mr Li is always s_____ with himself in evening 填空
英语首字母填空题!Bill Gates was born in USA in 1955.When he was at school,he n______ took a book home to study or attended maths classes.He then went to Harvard,but left w______ getting a degree.By the age of forty-one,he was one of the world
I like dreaming,and I always think about what my future will be like in 5 years.
用含有字母的式子可以简明地表示计算什么和运算什么,还可以表示什么关系
It's always been about me myself and I If all relationships were nothing but a waste of time I neve
it is nothing very secret, but it is always ______ to keep quiet about theseA, or rather B. as well as C. either D. as well这题选什麼?为什麼?啊哦,答案是D,就是不知道为什麼……
猫头鹰为什么在晚上才开始捕食呢?
猫头鹰怎么会在晚上捕食
猫头鹰靠什么捕食超声波?次声波?视觉?听觉?