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一块梯形菜地的面积是10平方米,它的上底是4米,高是多少米?（列方程计算） 去年甲,乙两车间计划共完成利税150万元,由于技术革新,生产效率大幅提高,结果甲车间超额完成利税110%,乙车间超额完成利税120%,两车间一共上缴利税323万元,问甲,乙车间实际上各缴利税多少万 红红和明明轮流拿花片,红红拿1个,明明拿3个,红红拿5个,明明拿7个.像这样,当红红分别拿9个、13个、17个、21个、25个花片后,明明也依次拿了11个、15个、19个、23个、27个花片.小朋友,你知道红 去年甲、乙两车间计划完成税利150万元,由于技术革新,生产效率大幅提高,结果甲车间超额完成税利110%,乙车间超额完成税利120%,两车间一共上缴税利323万元.问甲、乙两车间实际上缴税利多少 有没有人知道2006年美国数学建模的题目,最好用英文描述!? a^3-b^3=a^2-b^2 则a+b的取值范围 电动车的电机牌子是双力,型号SLI6*60V10046496是什么意思? 谁知道一种转速最快,体积最小的电动机? 微型超声波马达镜头有什么标志? 是不是电动车电机漏油了呀? 氧硫化亚铁与盐酸反应离子方程式feso4可忽略 Tom left here and went to London two days ago.(同义句) Tom's brother left his hometown two years aga.(同义句)Tom's brother______ _______ _______ _______his hometown for two years.It____ _____ two years_____Tom's brother left his hometown.Two years ______ _______ _______Tom's brother left his hometown 2-10例题没看懂, 英语“对划线部分提问”这类题型的题应该怎么做,讲解,再举一两个例子!讲一下做的方法我可以给分的 英语“对划线部分提问”这类题型的题应该怎么做,讲解,再举一两个例子!我可以给分的 含羞草的叶子为什么会合拢 含羞草有哪些特点 she left shanghai two years ago ,保持句意.怎么填she has _ _from shanghai for two years.这里的left we know this area,two hundred years ago,was a lake__two-thirds of the size at presenttwo-thirds its present size要说为什么 含羞草的秘密 含羞草的秘密是什么 高一英语26She took（ ） bus to her mother‘s （ ）she had taken to work every day for the last 15 years.A the same ,that B the same ,as C such,that D such,as My uncle has been living here for twenty years (用since 改写) 这个应该怎么改? We have been living here for 12 years.(改同义句）We have been here ____ 12 years ____. i have lived here for 3 years与 i have been living here for 3 years有什么区别 高一英语22题 0.57的平方根约等于0.075对吗?说说理由要说理由 铁和硫化亚铁混合物和盐酸反应哪个先反应呀? 铁变成硫化亚铁 Then shop ____(open) at 8a.m. and ______(close) at 10p.m.可能是opens吗 The shop opens at 7:45a.m and close at 8:00 p.m改为同义句改为The shop ( )( )( )7:45a.m to 8:00p.m [-B18] The companies are working together to create ______ they hope will be the best means oftransport in the 21th century.A.which B.thatC.whatD.who翻译并分析