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When people talk about the digital divide, they usually mean the (1) between people who are ben...
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WhenpeopletalkaboutthehistoricspotsinBeijingthefir
which
that
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WhenChinesepeopletalkaboutAmericancitiesthefirst__
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one
that
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阅读B.部分内容选出最佳答案InEnglandpeopledon’tusuallytalktoomu
Inmostlanguagesagreetingisusuallyfollowedbysmallta
Nowadayswhenpeopletalkaboutmagiciansthefirstone___
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WhenpeopletalkaboutthecitiesoftheU..S..thefirst___
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Inmostlanguagesagreetingisusuallyfollowedbysmallta
InEnglandpeopledon’toftentalktoeachotherwhentheytr
阅读理解InEnglandpeopledon’tusuallytalktoomuch.Youcang
.WhenforeignpeopletalkaboutthecitiesofChinathefirs
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Inmostlanguagesagreetingisusuallyfollowedbysmallta
WhenpeopletalkaboutthescenicspotsinAnhuithefirst__
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InEnglandpeopledon’toftentalkmuch.Youcangetonabuso
阅读理解InEnglandpeopledon’tusuallytalktoomuch.Youcang
Nowadayswhenpeopletalkaboutmagiciansthefirstonecom
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WhenpeopletalkabouttheNewWorldtheyreferto______.
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InEnglandpeopledon’toftentalkmuch.Youcangetonabuso
阅读理解InEnglandpeopledon’toftentalktoeachotherwhenth
Inmostlanguagesagreetingisusuallyfollowedbysmallta
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设x0＞0证明存在并求之．
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 11
设有向量场A=2x3yzi-x2y2zj-x2yz2k则其散度divA在点M112处沿方向l=22-1的方向导数______．
设函数y=yx由参数方程所确定其中f可导且f’0≠0则
求幂级数的收敛域及和函数．
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 3
设n阶实对称矩阵A的n个特征值λii=12n互异X1为λ1对应的单位特征向量证明方阵A-λ1X1的特征值为0λ2λn．
设fxy为连续函数且则fxy=______．
设A是m×n阶矩阵B是n×s阶矩阵则方程组Bx=0与ABx=0同解的充要条件是______
已知k＞0对于反常积分的敛散情况下面判断正确的是______
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 19
设n阶可逆矩阵A满足｜A｜=｜kA｜k＞0则k=______．
设｜a｜≤1求Ia=的最大值．
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 17
设二次型fx1x2x3=的矩阵合同于Ⅰ求常数aⅡ用正交变换法化二次型fx1x2x3为标准型．
设X1X2Xn为来自标准正态总体X的简单随机样本记则ET2=______．
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 9
设fx在区间[ab]上连续且fx＞0证明Ⅰ方程Fx=0在ab内有唯一实根Ⅱ函数|Fx|在ab内有且仅有一个不可导的点．
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 5
设有微分方程xy’+y=φx其中φx=试求在0+∞内连续的函数y=yx使之在01和1+∞内都满足所给方程且
设ft为连续函数a是常数下述命题正确的是______
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 13
设D://0≤x≤20≤y≤2．Ⅰ求Ⅱ设fxy在D上连续且证明存在ξη∈D使｜fξη｜≥
已知矩阵与矩阵等价.I求a的值Ⅱ求可逆矩阵P和Q使PAQ=B．
设φuvw有一阶连续偏导数z=zxy是由φbz-cycx-azay-bx=0确定的函数则
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 1
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 7
Asthebaby-boomergenerationcontemplatestheprospectoftheZimmerframetherehasneverbeenmoreinterestindelayingtheprocessofageing.Oneconsequencehasbeenan1riseinthepopularityofbrain-traininggames.Buthow2reallyisadailydoseofcrypticcrossword RobertWilsonaneuropsychologistatRushUniversityinChicagoandhiscolleaguesdecidedto3out4followingagroupofpeoplewithoutdementia.Participantswereaskedto5howfrequentlytheyengagedincognitively6activities.Theresearcherswerelookingforsuchthingsasreadingnewspapersbooksandmagazines7challenginggameslikechesslisteningtotheradioandwatchingtelevisionand8museums. ThegoodnewsastheyreportinNeurologyisthat9activityofthissortseemstoslowtherateof10declineinthosewithoutcognitive11.ThebadnewsisthatinthosewhodothendevelopAlzheimer’sdiseaseitisassociatedwithamorerapid12decline. Whatseemstobehappeningisthatcognitivestimulationhelps13theeffectoftheneurodegenerativelesionsassociatedwithdementia.Itdoesnot14makethemgoaway.Theycontinueto15sothatwhenthediseasedoeseventuallytake16therearemoreofthemaroundthanthereotherwisewouldbewhichresultsinamore17cognitivefalloff.Thatisnotamessageofdespair18becausethelengthoftimesomeonesuffersfromdementiaisthus19andtheirhealthylifeprolonged.Sothemessageis20onwiththecrosswords. 15
设二维离散型随机变量xy的概率分布的部分数据如下已知EX=0且X与Y不相关．Ⅰ试将分布中的其余数据填入空白处Ⅱ试问X与Y是否独立Ⅲ求covXY2．
设f’’x连续且f’’x＞0f’0=0求极限其中ux是曲线y=fx在x点处的切线在z轴上的截距．
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