更多“Select the sentence that mentions a specific moral dilemma r”相关问题
  • 第1题:

    设有关系R(A,B,C)和S(C,D),与关系代数表达式ΠA,B,D(σR,C=S.C(R×S))等价的SQL语句是______。

    A.SELECT*FROMR,S WHERE R.C=S.C

    B.SELECT A,B,D FROM R,S WHERE R.C=S.C

    C.SELECT A,B,D FROM R,S WHERE R=S

    D.SELECT A,B FROM R WHERE(SELECT D FROM S WHERE R.C=S.


    正确答案:D

  • 第2题:

    已知有关系模式R(sno,sname,age),其中sno表示学生的学号,类型为Char(8),前4位表示入学年份。查询所有2003年入学的学生姓名(sname),SQL语句是 _______。

    A.SELECT sname FROM R WHERE.sno='2003%'

    B.SELECT sname FROM R WHERE sno LIKE '2003%'

    C.SELECT sname FROM R WHERE sno='2003_'

    D.SELECT sname FROM R WHERE sno LIKE '2003_'


    正确答案:B

  • 第3题:

    设有关系R(A,B,C) 和S(C,D) 与关系代数表达式πA,B,D(σR,C=s.c(R×S))

    等价的SQL语句是

    A.SELECT*FROM R,SWHERE R.C=S.C

    B.SELECT A,B,D FROM R,S WHERE R.C=S.C

    C.SELECT A,B,D FROM R,S WHERE R=S

    D. SELECT A,B FROM R WHERE (SELECT D FROM S WHERE R.C= S.C)


    正确答案:B
    解析:πA.B.D(σR.C=S.C(R×S))的意思是从关系R,S中选出满足R.C= S.C的列A,B,D。

  • 第4题:

    设有关系模式日(SC,SN,SA)、S(CP,CW),则SQL语句“SELECT*FORM. R UNION SELECT*FROM S”实现的功能是______。

    A.RCS

    B.RUS

    C.R-S

    D.R∞S


    正确答案:B
    解析:在SQL中,UNION指令的目的是将两个SQL语句的结果合并起来,所以UNION表示的逻辑代数中的“并”运算。

  • 第5题:

    Let's move from the general to the specific.This sentence means let’s talk about some particular and about some part, but not about the whole.


    正确答案:正确

  • 第6题:

    Given the following two tables: TAB1 R1 A A A B B C C D E TAB2 R2 A A B B C C D Which of the following queries returns the following result set? RETVAL E()

    • A、SELECT r1 AS retval FROM tab1 INTERSECT SELECT r2 AS retval FROM tab2
    • B、SELECT r1 AS retval FROM tab1 EXCEPT SELECT r2 AS retval FROM tab2
    • C、SELECT DISTINCT r1 AS retval FROM tab1, tab2 WHERE r1 <> r2
    • D、SELECT r1 AS retval FROM tab1 UNION SELECT r2 AS retval FROM tab2

    正确答案:B

  • 第7题:

    判断题
    Let's move from the general to the specific.This sentence means let’s talk about some particular and about some part, but not about the whole.
    A

    B


    正确答案:
    解析: 暂无解析

  • 第8题:

    单选题
    Select one answer choice.  It can be inferred that author mentions pineries primarily to ______.
    A

    demonstrate how greenhouses changed over time

    B

    contrast Italian and French forms of greenhouses

    C

    indicate the types of fruit that Europe once imported

    D

    present an example of a type of early greenhouse

    E

    show that greenhouses have been around for centuries


    正确答案: B
    解析:
    此题需结合整个段落的大意,该段主要说明的是greenhouse(温室)的历史,作者提到pineries主要为了说明早期温室发展的多种形式。C选项很有迷惑性,因为“pineries”是专为保护菠萝而建的,但这并不是作者想要阐述的重点。

  • 第9题:

    单选题
    Select one answer choice  Based on the first sentence, a reader can surmise that a crenellated tower is ______.
    A

    Wooden

    B

    notched

    C

    armored

    D

    delicate

    E

    colorful


    正确答案: B
    解析:
    第一句话中作者用”child’s drawing of a castle”来形容Bodiam Castle, 由此可以推测出城堡应该是“锯齿状的”,即B. notched。A. wooden木制的;C. armored装甲的; D. delicate精致的; E. colorful多姿多彩的,原文均没有涉及。

  • 第10题:

    多选题
    You have a share on your local computer. Someone has been intentionally damaging your files.  You want to be able to know which account is doing this. What do you do? ()
    A

    Turn on auditing for objects in the Local Security Policy and Select 'Process Tracking'.

    B

    Turn on auditing for objects in the Local Security Policy and Select 'Object Access'.

    C

    Use Windows Explorer to turn on auditing for the specific files.

    D

    Have the administrator for domains log you on as an administrator and enable auditing for a  specific file.

    E

    Turn on auditing for objects in the Local Security Policy and Select 'Account Management'.

    F

    Allow only one account at a time to log on to your shared folder. Check the event viewer to  see who logged on.


    正确答案: D,A
    解析: 暂无解析

  • 第11题:

    多选题
    Select the two answer choices that, when used to complete the sentence, fit the meaning of the sentence as a whole and produce completed sentences that are alike in meaning.  Woolf ______ conventional notions of truth: in her words, one cannot receive from any lecture “a nugget of pure truth” to wrap up between the pages of one’s notebook and keep on the mantelpiece forever.
    A

    anticipates

    B

    articulates

    C

    makes light of

    D

    mocks

    E

    pays heed to

    F

    puts up with


    正确答案: D,F
    解析:
    根据后半分句的描述可知,Woolf对传统意义上真理概念(即真理能保存于书本之中,且永置于炉架之上)是持否定和嘲讽的态度的(从句中比喻的使用即可看出),因此选项C makes light of (轻视,藐视;不在乎)和选项D mocks(嘲笑,嘲弄)符合句意。A anticipates 期望,预期。B articulates 清楚的表达。E pays heed to 注意,留意。F puts up with 忍受,容忍。

  • 第12题:

    问答题
    The Shakespearean drama opens with a moral dilemma—how to choose between individual freedom and societal                     Aneeds—then introduced the possibility that one does not always have the power to choose one’s own fate.No error        B                   C               D             E

    正确答案: B
    解析:
    句子前部分使用的是一般现在时“opens”,所以为保持时态一致,“introduced”应改为一般现在时“introduce”。

  • 第13题:

    已知有关系模式及(S_N0,S_NAME,AGE),其中S_NO表示学生的学号,类型为Char[8],前4位表示入学年份。查询所有2005年入学的学生姓名(S_NAME),SQL语句是(24)。

    A.SELECT S_NAME FROM R WHERE S_NO = '2005% '

    B.SELECT S_NAME FROM R WHERE S_NO LIKE '2005% '

    C.SELECT S_NAME FROM R WHERE S_NO = '2005%'

    D.SELECT S_NAME FROM R WHERE S_NO LIKE '2005%'


    正确答案:B
    解析:本题考查的是SQL语言的知识,SQL语言作为最常用的数据库语言,是必考的知识点,考生一定要牢固掌握SQL语言的基本语法和语义,并且能够灵活运用。在SQL语言中,用%来表示任意长度的通配符,用LIKE表示某种形式的条件。所以“HKE,2005%”的含义是找出所有以2005开头,后面任意长度字符的学号。

  • 第14题:

    在SQL Server 2008的某数据库中,设用户U1同时是角色R1和角色R2中的成员。现已授予角色R1对表T具有SELECT、INSERT和UPDATE权限,授予角色R2对表T具有INSERT和DENY UPDATE权限,没有对U1进行其他授权,则U1对表T有权执行的操作是( )。

    A.SELECT和INSERT

    B.INSERT、UPDATE和SELECT

    C.SELECT和UPDATE

    D.SELECT


    正确答案:A
    当用户被赋予的两种角色的权限出现冲突时,为了安全起见,都是DENY优先。而没有规定DENY权限的,如本题中的SELECT,则用户可以使用此权限。所以选A。

  • 第15题:

    设有关系R(A,B,C)和S(C,D)。与关系代数表达式πA,B,D(σR.C=S.C(R×S)等价的SQL语句是

    A.SELECT*FROM R,S WHERE R.C=S.C

    B.SELECT A,B,D FROM R,S WHERE R.C=S.C

    C.SELE4T 1,2,8 FROM R,S WHERE R=S

    D.SELECT A,B FROM R WHERE(SELECT D FROM S WHERE R.C=S.


    正确答案:B
    解析:本题是对关系基本运算与SQL语言转换的考查。题目中关系代数表达式的意思是从关系R,S中选出满足R.C=S.C的列A,B,D,比较4个选项中的SQL语句可知,正确答案为选项B。

  • 第16题:


    SELECT(请作答此空)FROM R,S();

    A.A、R.A,R,B,S,F
    B.R,A,S,B,S,E.C.R,A,S,E,S,F
    D.R,A,S,B,S,F

    答案:B
    解析:
    查询语句的标准格式为:SELECT [ALL|DISTINCT],<目标表达式>[,<目标表达式 >]...]FROM<表名>[,<表名 >]...[WHERE<条件表达式>] SELECT 对应的是投影运算,投影出笛卡尔积结果的1、5、7列,属性值是R.A、S.B、S.E。

  • 第17题:

    囚徒困境(prisoners’dilemma)


    正确答案:囚徒困境指两个被捕获的囚犯之间的一种特殊“博弈”,说明为什么甚至在合作对双方有利时,保持合作也是困难的。囚徒困境是图克(Tucker)在20世纪40年代首先提出的,之后作为博弈论的经典案例被广泛引用。囚徒困境反映了个人理性追求并不一定能达到最后集体理性的结果,而个人理性达到集体理性的论断一直是主流经济学的主要思想。
    囚徒困境是非零和博弈的著名例子,产生于被拘留并分别受审的罪犯的决策问题。假设检察官认为他们有罪,但未获确切的证据。摆在两个罪犯面前的情况是:两个人都不招供并不告发同谋犯,他们就会免受惩罚或判处轻刑;如果一个招供,而另一个拒绝招供,则招供者会受到从轻发落,而不认罪者会受到严惩;如果两个人都招供,则他们都会判刑,但没有只有一个人招供时判的那么重。本来“最好的”解是攻守同盟、拒不认罪,但从人的理性出发,每个人都受到引诱招供而让其他人承担后果,然而,这一符合个人理性的后果却导致了明显的不合集体理性的后果。“囚徒困境”对策适合于模拟各类冲突问题,如核裁军会谈、劳资双方的工资谈判等。
    囚徒困境模型深刻地揭示了社会和经济生活中的一种普遍情形,即“个人理性”与“集体理性”的矛盾,这就是“困境”。

  • 第18题:

    You are a network administrator of an organization. Maria and John are your network assistant. You have grant then the rights to modify the user properties in the computer management. You want to audit the modification in user accounts. What should you do?()

    • A、Turn on auditing for objects in the Local Security Policy and Select 'Process Tracking'.
    • B、Turn on auditing for objects in the Local Security Policy and Select 'Object Access'. 
    • C、Use Windows Explorer to turn on auditing for the specific files.
    • D、Have the administrator for domains log you on as an administrator and enable auditing for a  specific file.
    • E、Turn on auditing for objects in the Local Security Policy and Select 'Account Management'.
    • F、Allow only one account at a time to log on to your shared folder. Check the event viewer to  see who logged on. 

    正确答案:E

  • 第19题:

    单选题
    Directions: For each question in this section, select the best answer from among the choices given.  The following sentences test correctness and effectiveness of expression. Part of each sentence or the entire sentence is underlined; beneath each sentence are five ways of phrasing the underlined material. Choice A repeats the original phrasing; the other four choices are different. If you think the original phrasing produces a better sentence than any of the alternatives, select choice A; if not, select one of the other choices.  In making your selection, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, sentence construction, and punctuation. Your selection should result in the most effective sentence—clear and precise, without awkwardness or ambiguity.  It being difficult to monitor the eating habits of adults, so doctors must trust their patients to follow dietary recommendations.
    A

    It being

    B

    Because it is

    C

    It is

    D

    Being that it is

    E

    Although it is


    正确答案: E
    解析:
    “it being和being”这样的短语不是标准短语,经常在非正式场合时被用来指原因。第二个从句之前已经有连词so,因此在句子开始没有必要用because或since。因此最好的选项为C。

  • 第20题:

    问答题
    Select the sentence that indicates the historical aspect of hiira.

    正确答案: The best answer is:This third gender is referenced in the earliest available records from the Indian Subcontinent, and was an established presence in the Vedic culture.
    解析:
    题干中的关键词是“historical aspects”,通读全段,可以发现倒数第二句中对“earliest available records”以及“Vedic culture”的描述符合“historical”的要求。

  • 第21题:

    问答题
    Select the sentence within the paragraph that describes why sales of Edison’s concrete furniture turned out to be unsuccessful.

    正确答案: The best answer is:This furniture was too heavy and expensive to ever become popular.
    解析:
    文段最后一句提到the furniture was “too expensive to become popular”,即说明其销量不好,因而正确答案是,“This furniture was too heavy and expensive to ever become popular.

  • 第22题:

    单选题
    Given the following two tables: TAB1 R1 A A A B B C C D E TAB2 R2 A A B B C C D Which of the following queries returns the following result set? RETVAL E()
    A

    SELECT r1 AS retval FROM tab1 INTERSECT SELECT r2 AS retval FROM tab2

    B

    SELECT r1 AS retval FROM tab1 EXCEPT SELECT r2 AS retval FROM tab2

    C

    SELECT DISTINCT r1 AS retval FROM tab1, tab2 WHERE r1 <> r2

    D

    SELECT r1 AS retval FROM tab1 UNION SELECT r2 AS retval FROM tab2


    正确答案: D
    解析: 暂无解析

  • 第23题:

    问答题
    The following sentences test your ability to recognize and usage errors. Each sentence contains either a single error or no error at all. No sentence contains more than one error. The error, if there is one, is underlined and lettered. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence is correct, select choice E. In choosing answers, follow the requirements of standard written English.  During the excavation of Pompeii, many people worried that artifacts are being destroyed by care-less techniques,                           A              Bbut the dig continued in spite of their concerns. No error   C          D             E

    正确答案: B
    解析:
    因为句子中动词使用“worried”过去时形式,因此B项谓语动词也应使用过去时态。