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英语新闻的开头怎么写?含日期,天气等 各位学霸请帮忙写一篇200至300词的英语演讲稿, “创新是一个民族精神的灵魂,是一个国家兴旺发达德不竭动力.”对于这句话,你是如何理解的 设x^5+y^5=2,证明x+y≤2 已知2的X方=3,2的y方=5,2的z方=15,试说明x+y=z. 已知2^x=3,2^y=5,2^z=15,试说明：x+y=z 已知|x-1|+(y-3)^2=0,说明x^2010+y^2010是5的倍数 高中使用什么奥林匹克竞赛书籍好 可以拜托你帮我推荐几本高中数学奥赛的书吗?谢谢! 已知x²=5,不解方程求代数式x³-3x²-5x+21的值 how is the young man回答同上..随便写回答..,但要正确.. ------How is the young man?-------________________ How is the young man? 如果关于x的一元二次方程 kx²+4x-3=0 有两个不相等的实数根,求k的取值范围.一讲解我就乱了 求高二新世纪版英语伴你成长Final Examination（B）的全部答案! what animal do you think is e_____?a Dolphin is. what is the biggest animal on the earth?is an elephant much smller than a blue?_______________________________what's your favourite event______________________which fish can swim faster than most boats?___________________________________how can peopl What is the biggest animal on earth? 翻译一下2013版英语八年级下册第六单元42页的2d谢了 这个热化学方程式怎么写(1)12g Mg(S)在氧气中完全燃烧生成MgO(S)放出247.12KJ热量(2)0.5molH2(G)与0.5mol I2(G)反应生成HI(G)吸收25.9KJ热量 写热化学方程式2.3g某液态有机物和一定量的氧气混合点燃,恰好完全燃烧,生成2.7g的水和2.24L的CO2（标况）,并放出68.35kJ的热量.这里没给出有机物的相对分子质量怎么求分子式啊. 如何写热化学方程式 1.There was something ( )the man 's voice that sounded familiar.A.about B.from C.in D.on2.Until he took off his glasses ( )A.I didn't recognize him B.I hadn't recognized himC.didn't I recognize him D.hadn't I recognized himA；B.但本人没弄懂的 初三数学,三至五小题! 小学六年级的大队委演讲稿,300字左右 我要学物理奥赛 用什么书好 国际商务单证员和跟单员有什么区别?如题 一道英语语法选择题Do let your mother know all the truth.She appears to__everything.(tell)是填be told 吗?答案为什么是have been told? be told 为什么不行 英语语法——选择题一道!具体记不清了……好像是：Reading is to mind ____food is to body.(反正横线两边是两个完整的句子,意思就是：阅读对人来说就像是食物对身体一样重要）A.like B.what为什么不 一道英语语法的选择题It ——15 years since he left here.Awas B has been C has D will be 我看过很多这种类型的题都是选择is,要怎么区分啦 一道英语语法选择题...急4.---We haven't heard from Jane for a long time.---What do you suppose _____ to her?A.was happening B.to happenC.has happened D.having happened为什么选C不选D,不是suppose to 我记得还有一种suppose that的 That flat is too small for two people to live in.同义句that flat is ( ) ( ) ( ) for two people to live in.