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请问夏商周以前是的中国是一个怎么样的国家(公元前5000年-公元前3000年),那时的有王帝的么?全国人口大概有多少?他们的生活是怎么样的?背景又是如何?知道的朋友请说说. 在第一次世界大战期间,发生了哪些重要事件 口袋里有12个球 有3个红球 9个白球 摸5个球 不放回 有2个红球则中奖 求中奖的概率 ★孩子英语口语不好怎么办★ 怎么用matlab求一个复杂函数的偏导?本人初学,可否举个例子,例如,求E=x^2-2*x+y^2-8*y中x的一阶偏导、二阶偏导 matlab偏导函数怎么用 急求关于美的名言、片段等!同上, 已知无穷等比数列{an}的前n项和为Sn,各项的和为S,且lim(Sn-2S)=1,则其首项a1的取值范围 科学月考反思200字 97分 班里成绩前三 毛病是粗心大意 然后上课总爱讲话不爱发言 月考检讨书考得不太好,中等250字 月考反思怎么写 已知等比数列{an}的首项为a1,公比为q,sn是它的前n项和,若lim(1/sn)存在,求公比q的取值范围 《草虫的村落》这篇文章中“静谧”的意思是 10: 已知X,Y属于R,求证X平方减去XY+Y平方大于等于X+Y减去1 Matlab中几个数值积分函数的比较和优缺点 草房子的考试题都有哪些啊 复习gmat语法时需要把错误选项纠正了, GMAT语法复习和逻辑复习1,白勇语法好还是MANHATTAN语法好一些?2,逻辑部分,狒狒逻辑好用一些还是MANHATTAN逻辑? 秦始皇帝和汉武帝都统一过货币,但是他们有没有区别?为什么要统一货币? 疯狂猜图 蓝色背景 一件红色T恤 一个球队 请教一道GMAT语法题,实在是看不懂~For the farmer who takes care to keep them cool,*providing them with high-energy feed,and milking them regularly,Holstein cows are producing* an average of 2,275 gallons of milk each per year.A.providing t 求助一道GMAT语法题A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.A.claims suggest that the economy might not be as weak as some analysts prev 请教一道GMAT语法题~The spraying of pesticides can be carefully planned,but accidents,*weather conditions that could not be foreseen,and pilot errors often cause much larger deposits of spray than they had* anticipated.A.weather conditions that 请教两道gmat语法题researchers have announced that the magnetic fields emitted by one manufacturer's security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on m 生活中的亲情片段描写100字 疯狂猜图,中间有个像肥皂的东西,白色的.背景是蓝色的,求品牌. gmat 语法问题according to scholars, the eatliest writing was probably not a direct rendering of speech, but a separate and distinct symbolc system of communication.A.was more likely to begin asB.more than likely began asC.more than likely beginni 帮忙挑战一下GMAT语法吧Q1:According to analysts,an alliance between three major personal computer companies and most of the nation’s largest local telephone companies would enable customers to receive Internet data over regular telephone li The debate over bilingual education centers on the issue of whether the United States should forster the idea of a single common language,an idea,some believe,that has in the past (been crucial in binding diverse constituencies together.)在这里我 有三个小朋友,他们的年龄是三个连续的自然数并且乘积是120,他们的年龄分别是多少? gmat的语法问题After several years of rapid growth, the healthy care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its pa a=6.3b,a与b成什么比例.