英文英语数学题小学初中10.ppt

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1、英数第二周周五1.Inthefigure,rectangleABCDhasdimensionsasshown.TheareaofrectangleBDFEis？2.In the given diagramABCDis a square withsides7√2cm.Eis apoint onDCsuch thatEC=2√2cm and angle∠CFE=90°.The areaofAFEDincm ² is?3.Abookwith12pagesneedsthe15digits1,2,3,4,5,6,7,8

2、,9,1,0,1,1,1,2inordertonumberallthepages.Whichoneofthefollowingnumberscannotbethenumberofdigitsneededinordertonumberallthepagesofabook?(A)31(B)543(C)1998(D)1999(E)20014.An office employs thirty people. Five of themspeak Spanish, French and English. Nine spe

3、akSpanish and English, twenty speak French ofwhich twelve also speak Spanish. EighteenspeakEnglish. No one speaks only Spanish. How manyemployees speak only English?5.ABCDisaparallelogramwithverticesAandBfixed,butverticesCandDaremovable.Ifthelengthsofallthe

4、sidesarefixed,thenthepathoftheintersectionofthediagonals,asCandDmoveisa(A)circle(B)partofaparabola(C)Rhombus(D)straightlinesegment(E)partofahyperbola6.Thesumofthefirstptermsofasequenceofnumbersisp(p+1)(p+2).The10thtermofthesequenceIs7.Startingwiththenumbers

5、1,2,3...500,anewsequenceisformedbydeletingnumberssothatthesumofanytwonumbersofthenewsequenceIsnev-eramultipleofseven.Whatisthemaximumlengthofthenewsequence?8.Rememberthat1000cm³ofwaterweighs1kgDuringarainshower,10mmofrainfellonarec-tangularsoccerfieldwithdi

6、mensions100mby50m.Themassofrainthatfellonthefieldwas(A)0.5ton(B)5kg(C)50ton(D)50kg(E)5ton答案：1.22.473.D4.65.A6.3307.2178.C