单选题In the expression an, n is an even power. Which of the following expressions does not have even power?A an +lB a2nC an+2D a3nE an+4

题目
单选题
In the expression an, n is an even power. Which of the following expressions does not have even power?
A

an +l

B

a2n

C

an+2

D

a3n

E

an+4

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2.A user’s laptop does not produce sound even though the volume settings are at maximum in theoperating system. Which of the following would MOST likely resolve this issue?()A. A new sound cardB. A new speakerC. A BIOS updateD. A hardware volume control

3.Which effect does speed through the water have on a vessel which is underway in shallow water ________．A.A decrease in the speed results in a decrease in steering response and maneuverabilityB.An increase in speed results in the stern sucking down lower than the bowC.An increase in speed results in the vessel rising on an even planeD.A decrease in speed results in the vessel sucking down on an even plane

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参考答案和解析
正确答案： D
解析：
Because n is an even power, n + 1 is an odd power. That means an+1 has an odd power. The powers in the other choices are even.
更多“单选题In the expression an, n is an even power. Which of the following expressions does not have even power?A an +lB a2nC an+2D a3nE an+4”相关问题

  • 第1题：


    Which of the following statements is true according to Tocqueville？( )

    A.As social conditions and opportunities improve，social satisfaction grows more quickly.
    B.Social mechanisms have seemingly conflicting nature.
    C.As social conditions improve，there will be fewer people enjoy the social privilege.
    D.As social conditions improve，the people will have more concentrated power.

    答案：B
    解析：
    细节题。根据最后一段第一句social frustration increases as social conditions improve可知，A项错误；根据最后一段最后一句He wrote that this growing hatred of social privilege，as social conditions improve，leads to the state concentrating more power to itself可知，享有特权的不是人民而是state本身，故D项错误；全文并未提及“享受特权的人数”问题，因此C项错误。故本题选B。参考译文：法国政治科学家、历史学家、哲学家和政治家阿历克西·德·托克维尔以一本四卷册的书《美国的民主》闻名于世。他于1831年来到美国，研究美国的民主形式及其对世界其他地方的意义。在仅仅九个月的访问之后，他完成了一本非凡的作品，至今被奉为经典。托克维尔有着非同寻常的观察力。他不仅描述了政府的民主制度及其运作方式，而且还描述了它对美国人的思考、感受和行为的影响。许多学者认为，托克维尔对美国传统信仰和价值观的理解比任何其他描写美国的人都要深刻。尤其引人注目的是，他在近200年前观察到的这些许多特征今天在美国人身上仍然可见且具有重大意义。他的观察也很重要，因为他访问的时间-19世纪30年代——是在美国工业化之前。这是小农、商人和西部边疆定居的时代，是一个新国家的传统价值观新建立的历史时期。在美国宪法通过大约40年后的短短一代人时间里，这种新的政府形式产生的社会中，人人都有独特的价值观。然而，他是一位中立的观察者，看到了这些品质的两面性。《美国的民主》的第一部分写于1831-1832年，出版于1835年。这本书对美国政府和社会进行了非常积极和乐观的描述，大受欢迎。他试图一瞥美国社会的本质，同时宣扬自己的哲学：阶级平等和不可避免的、根深蒂固的贵族特权。他用了四年时间才完成这本书的剩余部分，并于1840年出版第二部分。第二部分比第一部分更加悲观，他警告了专制和政府集权的危险，并将他的观点和批评直指法国。因此，除了在英国受到高度赞扬之外，它没有像第一部分那样受到欢迎。《美国的民主》着重分析为什么共和党代议制民主在美国取得了成功，但在许多其他地方却失败了。托克维尔指出，宗教在美国能发挥强大作用是因为它与政府分离，所有党派都认同这种分离。他将此与法国作对比，在法国，他认为民主党和宗教之间存在不健康的对立，这与教会和国家之间的联系有关。托克维尔还概述了人类可能过度追求平等，预示着20世纪会产生极权主义国家。托克维尔观察到社会机制存在矛盾，这在后来被称为“托克维尔效应”，即“随着社会条件的改善，社会挫折感也会增加”。他写道，随着社会条件的改善，这种对社会特权日益增长的仇恨导致国家将更多的权力集中到自己身上。

  • 第2题：

    A client needs to be able to install a new local printer, but does not currently have permission to do so. Which of the following is the BEST user group to put the client in, to allow the printer to be installed?（）

    • A、Power Users
    • B、Users
    • C、Backup Users
    • D、Guest

    正确答案:A

  • 第3题：

    A technician has just installed an upgraded graphics card. The computers power turns off before itfinishes booting. Which of the following is the cause of the problem? （）

    • A、The monitor cannot display the increased resolution that is a feature of the new graphics card.
    • B、The power supply does not provide enough wattage to power the new graphics card.
    • C、The new graphics card is incompatible with the existing processor.
    • D、The computer does not have enough RAM to support the new graphics card.

    正确答案:B

  • 第4题：

    What does the FORCE option for creating a view do?（）

    • A、creates a view with constraints
    • B、creates a view even if the underlying parent table has constraints
    • C、creates a view in another schema even if you don't have privileges
    • D、creates a view regardless of whether or not the base tables exist

    正确答案:D

  • 第5题：

    单选题
    What does the FORCE option for creating a view do? （）
    A

    creates a view with constraints

    B

    creates a view even if the underlying parent table has constraints

    C

    creates a view in another schema even if you don't have privileges

    D

    creates a view regardless of whether or not the base tables exist


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    a and b are positive, a is even and b is odd. Which of the following must also be odd?
    A

    ab

    B

    a/b

    C

    a + 2b

    D

    ba

    E

    (ab) a


    正确答案： D
    解析：
    An odd number raised to an even power equals an odd number. Take 32 = 9, for example, ba is the correct answer.

  • 第7题：

    多选题
    If x and y are both positive even integers, which of the following expressions must be even? (Select all such expressions.)
    A

    xy

    B

    (x+1)y

    C

    x(y+1)


    正确答案： B,A
    解析：
    由于题目中x和y是变量，可以根据题干给出的条件给x, y设定符合条件的数值，代入各选项，看结果是否符合题干要求，即可得出答案。

  • 第8题：

    单选题
    Which of the following words does not have consonant cluster？
    A

    spring

    B

    master

    C

    test

    D

    stream


    正确答案： B
    解析：

  • 第9题：

    单选题
    If m and n are positive integers and 3m+n-1=2m+2n, which of the following must be true?I. m and n are consecutive integers.II. m is even.III. n is odd.
    A

    None

    B

    I only

    C

    II only

    D

    III only

    E

    I, II, and III


    正确答案： D
    解析：
    Since m=n+1, where m and n are given as positive integers, Roman numeral choice I is true. Since, m=n+1, m can be either odd or even, hence choice II is false. Roman numeral choice III is also false since n can be either even or odd.

  • 第10题：

    单选题
    A technician does not have power to a PC. Which of the following tools should the technician use to check for electricity?（）
    A

    Cable tester

    B

    Power supply tester

    C

    Tone generator

    D

    Multimeter


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following listed diagnostics products provides easy notification and identification of a failed component， even if the power is off？ （）
    A

    Insight manager

    B

    PowerPath

    C

    LightPath Diagnostics

    D

    Sun Server Diagnostic


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    In the expression an, n is an even power. Which of the following expressions does not have even power?
    A

    an +l

    B

    a2n

    C

    an+2

    D

    a3n

    E

    an+4


    正确答案： D
    解析：
    Because n is an even power, n + 1 is an odd power. That means an+1 has an odd power. The powers in the other choices are even.

  • 第13题：

    A technician does not have power to a PC. Which of the following tools should the technician use to check for electricity?（）

    • A、Cable tester
    • B、Power supply tester
    • C、Tone generator
    • D、Multimeter

    正确答案:D

  • 第14题：

    A user’s laptop does not produce sound even though the volume settings are at maximum in theoperating system. Which of the following would MOST likely resolve this issue?（）

    • A、A new sound card
    • B、A new speaker
    • C、A BIOS update
    • D、A hardware volume control

    正确答案:D

  • 第15题：

    Which of the following listed diagnostics products provides easy notification and identification of a failed component， even if the power is off？ （）

    • A、Insight manager
    • B、PowerPath
    • C、LightPath Diagnostics
    • D、Sun Server Diagnostic

    正确答案:C

  • 第16题：

    单选题
    If a and b are integers and the sum of ab and b is even, which of the following could be true?Ⅰ. a and b are both odd.Ⅱ. a is even and b is odd.Ⅲ. a is odd and b is even.
    A

    Ⅰ only

    B

    Ⅱonly

    C

    Ⅲ only

    D

    Ⅰ and Ⅱ

    E

    Ⅰand Ⅲ


    正确答案： C
    解析：
    Plug-in. StatementⅠ：if a and b are both odd, says a=1 and b=3, then ab+b=6. Since the sum is even, statementⅠ is true. StatementⅡ：1et a=2 and b=3, then ab+b=9. Since the sum is odd, this statement is false. Statement Ⅲ：let a=3 and b=2, then ab+b=8, which is even. So both statement Ⅰand statementⅢ are true.

  • 第17题：

    单选题
    A user’s laptop does not produce sound even though the volume settings are at maximum in theoperating system. Which of the following would MOST likely resolve this issue?（）
    A

    A new sound card

    B

    A new speaker

    C

    A BIOS update

    D

    A hardware volume control


    正确答案： A
    解析： 暂无解析

  • 第18题：

    多选题
    Which four statements correctly describe functions that are available in SQL? （）
    A

    INSTR returns the numeric position of a named character.

    B

    NVL2 returns the first non-null expression in the expression list.

    C

    TRUNCATE rounds the column, expression, or value to n decimal places.

    D

    DECODE translates an expression after comparing it to each search value.

    E

    TRIM trims the heading of trailing characters (or both) from a character string.

    F

    NVL compares two expressions and returns null if they are equal, or the first expression of they are not equal.

    G

    NULLIF compares twp expressions and returns null if they are equal, or the first expression if they are not equal.


    正确答案： E,D
    解析： 暂无解析

  • 第19题：

    单选题
    A technician has just installed an upgraded graphics card. The computers power turns off before itfinishes booting. Which of the following is the cause of the problem? （）
    A

    The monitor cannot display the increased resolution that is a feature of the new graphics card.

    B

    The power supply does not provide enough wattage to power the new graphics card.

    C

    The new graphics card is incompatible with the existing processor.

    D

    The computer does not have enough RAM to support the new graphics card.


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    According to the passage, which of the following should be considered sources of renewable energy?
    A

    Petroleum, sunlight and wind power.

    B

    Gas, water and fossil fuels.

    C

    Coal, natural gas and hydropower.

    D

    Sunlight, water and wind power.


    正确答案： A
    解析：
    题目问的是：根据篇章，下列哪一项可以看作是可再生能源的来源？根据常识可知，是日光、水和风力。故选D。

  • 第21题：

    单选题
    Which effect does speed through the water have on a vessel which is underway in shallow water （）.
    A

    A decrease in the speed results in a decrease in steering response and maneuverability

    B

    An increase in speed results in the stern sucking down lower than the Bow

    C

    An increase in speed results in the vessel rising on an even plane

    D

    A decrease in speed results in the vessel sucking down on an even plane


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    An administrator is troubleshooting a power supply that is believed to have failed. Which of the following tools will BEST help test the power supply？（）
    A

    ESD Equipment

    B

    Multimeter

    C

    POST Card

    D

    Toner Probe


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    A technician has found that the uninterruptible power supply (UPS) connected to a server does not have sufficient battery power to allow the server to shutdown gracefully. Which of the following is the MOST cost effective way to allow this server to shutdown gracefully?（）
    A

    Install a second UPS.

    B

    Increase the size of the swapfile.

    C

    Increase the size of the pagefile.

    D

    Install an extended battery pack into the UPS


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    Stone does not（）, and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
    A

    crack

    B

    decay

    C

    destroy

    D

    crush


    正确答案： B
    解析： 暂无解析

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