帆软公式in

一个长方体长,宽,高恰好是3个连续的自然数,并且它的体积的数值等于它的所有棱长之和数值的2倍,那么这个长方体的表面积是（ ）（为什么?）A,74 B,148 C,150 D,154b^3-b=24b什么意思？ 2010 年上海世博会山东馆以“齐鲁青未了”作为展示主题.“齐鲁”能代表山东,起源于中国古代哪一制度( )A.分封制B.世袭制 C.郡县制 D.行省制 The simple truth appears to be that ______ foods are the key to excellent health.a.complete b.whole c.entire d.all 为什么选择这个答案1.All the people around the world have the same simple dream ( ) they will always live in peace and comfort A.that B.which c,where when 知道选择A.但是想知道原因和句子翻译2.It would have made a ________ if yo 1.I _______ Tom has made a mistake.A.am thinking B.shall think C.think D.have been thinking2.I _______ writing the article now.A.finish B.is finishing C.finished D.have finished 几道英语选择题,请写出为什么选这个答案1.Does the TV say____happened in Iraq every day A.someting terrible B.anyting terrible 2.Unless he ______to help us,we shall lose the game.A.promises B will promiseC.would promise D had promise3. 1.It's a little hot in the room.Will you please keep the windows ___?A.open B.opened C.opening [why选A不选C]2.—I had a relly wonderful time in Beijing.It's one of the most beautiful cities in China.—________.[why 选D不选A]A.It's a pleasure 1.Heading home after _____ day's work,he never knew ahead of ____ time whether he would catch the bus.A.不填；the B.a ；不填 C.不填；不填 D.the；the2.she_____ Japamese when she was in Japan when she was in Janpan.now she can speak it free ____more and more forests destroyed,some animals are in danger of dying out.A.With B.By C.As D.For 2.No one knows for sure when such a custom first ___A.came into power B.came into being C.came true D.came out 关于高一英语1到4单元的选择题 21-26英语选择题,请告诉我为什么选择这些答案,依据. 在一个密闭容器里有一氧化碳、氢气、氧气共16.5g,用电火花引燃,完全燃烧,再将燃烧后的气体用过氧化钠充分吸收,过氧化钠增重7.5g,则原混合气体中氧气的质量分数是（ ）A、36% B、40% C、54.5% 将NaHCO↓3和Na↓2CO↓3·10H↓2O的混合物45.5g溶于水制成400ml溶液,其中钠离子浓度为1mol每L；将相同质量的上述混合物加热至质量不再变化,此时残留固体质量为A、21.2gB、24.2gC、16.8gD、31.8g 为了探索月球上是否存在生命的痕迹,首先要分析月球岩中是否包藏有碳氢化合物.科学家用氘盐酸即DCL的D2O溶液处理岩石样品,收集放出的气体加以分析,结果只发现有一些气态碳氘化合物.试 与3.2克SO2所含的氧原子数相等的NO质量为 往X盐溶液中通入过量氯气后再滴加氯化钡溶液和稀盐酸,溶液中有白色沉淀生成,则X可能 A．Na2SO3 B．FeSO4 C．CaCl2 D．Na2CO3 1〜5的选择题 1-5题,选择题 求选择题的1到5题 对于点A（x1,y1）,B（x2,y2）,定义一种运算：A⊕B=（x1+x2）+（y1+y2）．例如,A（-5,4）,B（2,-3）,A⊕B=（-5+2）+（4-3）=-2．若互不重合的四点C,D,E,F,满足C⊕D=D⊕E=E⊕F=F⊕D,则C,D,E,F四点（　　）A．在 某项目固定资产原值为10000万元,净残值率5%,折旧年限10年,按双倍余额递减法计算的第8年末固定资产净值1678万元,第lO年的折旧费应为（）万元A 689 B 589 C 489 D 789 一道英语选择题,希望能有解析（ ）and I'll get the work finished.A.Have one more hour B.One more hourC.Given one more hour D.If I have one more hour希望能详细的解释每一个选项!感激万分!希望能仔细详细地分析A和C 要除去氮气中混有的少量H2,CO,CO2,得到干燥的氮气（氮气不与下列试剂反映,假设每步反应都是完全的）,通过下列试剂的先后顺序中,正确的是：1.浓硫酸 2.苛性钠溶液 3.灼热的氧化铜 A、 1 2 3 B 1.30．改革开放后,我国的经济发展成绩显著,有学者曾经形象的把东部地区经济发展的优势比作“满弓待发之箭”.期中“弓箭弦”是指 （ ）①14个沿海开放城市如弓 ②长江中下游如箭③京九 oranger是橘子的意思,可是有一道选择题如下:( ) Please drink some ________ .A.pork B.melons C.oranger D.orangers这道题应该选什么呢? 有一道选择题请高手帮我解决一下：某学生取一瓶稀硫酸,等体积分装在甲,乙两个烧杯中,再称取质量相等的镁带和锌粒,把镁带放入甲烧杯中,锌粒放入乙烧杯中,待反应结束后,发现甲烧杯中镁 I have six colour pencils;one is blue,another is red,and___ are green.A.the other B.another C.others D.the others为什么不用C呢 British people eat （ ） a lot ,and they are usually cooked indifferent ways.A.beef B.chicken C.fish D.potatoes They____ the Palace Museum next week.A.hope me to visit B.hope visitingC.hoped themselves to visit D.hope to visit I will spend as much time as I can after the flowers in the garden.A.looking B.to look 求教一道英语选择题1.He bought a bike last year.He has had the bike ()A:since a year ago B:for one-yearone--------year 中间有横线 一道英语选择题.求教come and join us,jenny.I am sorry,but i am really busy now ,if I -----time ,I would certainly go.A will have B have had C had D have