多选题If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)Ap + q is evenBpq is oddCp2-q2 is even

题目
多选题
If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)
A

p + q is even

B

pq is odd

C

p2-q2 is even

相似考题

1.18 Which of the following statements about accounting ratios and their interpretation are correct?1 A low-geared company is more able to survive a downturn in profit than a highly-geared company.2 If a company has a high price earnings ratio, this will often indicate that the market expects its profits to rise.3 All companies should try to achieve a current ratio (current assets/current liabilities) of 2:1.A 2 and 3 onlyB 1 and 3 onlyC 1 and 2 onlyD All three statements are correct

2.Which of the following statements is true?A．The volume of deals for hedging purposes is much higher than that for arbitraging and speculative purposes.B．The foreign exchange business for commerce and tourism must be done before 11a.m.on 2 January.C．It is hedgers' money that drives much larger volume of other transactions.D．None of the above.

3.Which of the following is/are TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels?A.The securing of cargo on flats and trailers and in containers must be adequate to withstand both road and sea motionsB.The generally recommended lash angle cannot be greater than 45 degrees relative to the deck in any directionC.It is necessary for an adequate number of securing points on the vehicles themselves in order that lashings may be properly and safely utilizedD.All the above

4.12 Which of the following statements are correct?(1) Contingent assets are included as assets in financial statements if it is probable that they will arise.(2) Contingent liabilities must be provided for in financial statements if it is probable that they will arise.(3) Details of all adjusting events after the balance sheet date must be given in notes to the financial statements.(4) Material non-adjusting events are disclosed by note in the financial statements.A 1 and 2B 2 and 4C 3 and 4D 1 and 3

更多“多选题If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)Ap + q is evenBpq is oddCp2-q2 is even”相关问题

  • 第1题：

    Which of the following statements is TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels?

    A.The securing of cargo on flats and trailers must be adequate to withstand road motions only

    B.The movements experienced by road borne cargo are the same as the movements of a ship at sea

    C.The generally recommended lash angle is no greater than 45 degrees relative to the deck in any direction

    D.It is not necessary for an adequate number of securing points on the vehicles themselves since setting the brakes is sufficient


    正确答案：C

  • 第2题：

    Which statement is true regarding the INTERSECT operator?（）

    • A、It ignores NULL values 
    • B、Reversing the order of the intersected tables alters the result 
    • C、The names of columns in all SELECT statements must be identical 
    • D、The number of columns and data types must be identical for all SELECT statements in the query 

    正确答案:D

  • 第3题：

    Which of the following statements is true regarding implementing Live Partition Mobility on two existing POWER6 based systems?（）

    • A、The systems must use internal storage for boot purposes. 
    • B、All virtualized ethernet adapters must be numbered below 10. 
    • C、The mobile partition's network and disk access must be virtualized. 
    • D、Each system must be controlled by a different Hardware Management Console (HMC). 

    正确答案:C

  • 第4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5题：

    多选题
    Which of the following statements are true? (Indicate all such statements.)
    A

    τ(5) =τ(7)

    B

    τ(5) τ(7) =τ(35)

    C

    τ(5) + τ(7) =τ(12)


    正确答案： A,B
    解析：
    5和7均只有两个正除数，因此根据题干信息，A项正确；35有四个正除数，所以B项也是正确的；12有6个正除数，因此C项错误；选择A、B两项。

  • 第6题：

    单选题
    An isosceles triangle has one angle with a measure greater than 95° and another with a measure of x°. Which of the following must be true?
    A

    x > 85

    B

    x = 85

    C

    x =42.5

    D

    x <42.5

    E

    x > 42.5


    正确答案： B
    解析：
    等腰三角形有两个角相等，且三角形内角度数总和为180度，所以不可能有两个角大于95度，故其他两个角为x度。假设其中一个角为96度。则x + x + 96 = 180 , 2x = 84, x = 42,根据以上选项，可知D为正确选项。

  • 第7题：

    单选题
    Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）
    A

    Carbon dioxide is corrosive when exposed to fire

    B

    Carbon dioxide should be applied slowly to a large engine room fire

    C

    Its total cooling effect is far greater than water

    D

    Its smothering effect is excellent for class B fires


    正确答案： B
    解析： 暂无解析

  • 第8题：

    多选题
    一p∧q的等值判断有（）。
    A

    p→q

    B

    一（p←q）

    C

    一（p→q）

    D

    一（p∨q）

    E

    一（q→p）


    正确答案： B,A
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following statements is true concerning an oil cooler?（）
    A

    The oil temperature is less than the cooling water temperature

    B

    The oil pressure is less than the cooling water pressure

    C

    The oil pressure is greater than the cooling water pressure

    D

    The oil flow control valve is always installed in the oil input line


    正确答案： C
    解析： 暂无解析

  • 第10题：

    多选题
    （多选）下列等值式成立的有（　　）。
    A

    P→Q⇔¬Q→¬P

    B

    P∨（P∧R）⇔R

    C

    P∧（P→Q）⇔Q

    D

    P→（Q→R）⇔（P∧Q）→R


    正确答案： D,C
    解析：
    使用特值法检验，B选项中，若令P⇔1、R⇔0，则P∨（P∧R）⇔1，R⇔0，二者不等值，故B不成立；C选项中，若令P⇔0、Q⇔1，则P∧（P→Q）⇔0，Q⇔1，二者不等值，故C项不成立；A、D由真值表可以验证成立，故本题选A、D。

  • 第11题：

    单选题
    A switch port on TK1 is being configured to support 802.1Q trunking.  Which of the following are true about 802.1Q trunking？（）
    A

    Both switches must be in the same VTP domain.

    B

    The encapsulation type of both ends of the trunk does not have to match.

    C

    The native VLAN on both ends of the trunk must be VLAN 1.

    D

    802.1Q trunking can only be configured on a Layer 2 port.

    E

    In 802.1Q trunking， all VLAN packets are tagged on the trunk link， except the native VLAN.


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    According to the passage, which of the following is true?
    A

    People in allocations are unwilling to conform to a general pattern.

    B

    Conformity is a special characteristic of business.

    C

    Businessmen are all original thinkers.

    D

    Businessmen are provided with greater opportunities than people in other professions.


    正确答案： A
    解析：
    细节题。原文最后一句提到“The fact is the large business unit provides greater opportunities for individuality and requires less in the way of conformity than other institutions of comparable size...”，意思是商业机构比其他机构给个人提供的个性发展空间都大，D项表述与原文相符。

  • 第13题：

    Which of the following statements is TRUE about the primary system dump device?（）

    • A、 It is shared. 
    • B、 It must be /dev/hd6. 
    • C、 It must be an internal disk. 
    • D、 It can be an external device.

    正确答案:D

  • 第14题：

    A switch port on TK1 is being configured to support 802.1Q trunking.  Which of the following are true about 802.1Q trunking？（）

    • A、Both switches must be in the same VTP domain.
    • B、The encapsulation type of both ends of the trunk does not have to match.
    • C、The native VLAN on both ends of the trunk must be VLAN 1.
    • D、802.1Q trunking can only be configured on a Layer 2 port.
    • E、In 802.1Q trunking， all VLAN packets are tagged on the trunk link， except the native VLAN.

    正确答案:E

  • 第15题：

    单选题
    The skulls and pelvic bones of some species of dinosaur share characteristics with the skulls and pelvic bones of all modern birds. Even though not all dinosaurs have these characteristics, there are scientists who claim that all animals that do have these characteristics are dinosaurs.　 If the statements above and the claim of the scientists are true, which of the following must also be true?
    A

    Birds share more characteristics with dinosaurs than they do with other animals.

    B

    Some ancient dinosaurs were indistinguishable from modern birds.

    C

    All animals whose skulls share the characteristics of those of modern birds also have pelvic bones that are similar to those of modern birds.

    D

    Modern birds are dinosaurs.

    E

    All dinosaurs are birds.


    正确答案： E
    解析：
    由文段可知，科学家根据一些恐龙的头盖骨和骨盆骨与所有现代鸟类的头盖骨和骨盆骨有许多相同特征，得出结论：所有具有这些特征的动物是恐龙，如果这个推理是正确的话，我们可以认为现代鸟类是恐龙，故本题选D项。

  • 第16题：

    多选题
    Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
    A

    c=d

    B

    l and k are parallel

    C

    m and l are perpendicular


    正确答案： C,B
    解析：
    根据题目中的已知信息无法推断出各直线的关系，因此B、C均不正确；而由图示可知，c和d分别是a和b的补角，由于a=b，所以c=d，A项正确。

  • 第17题：

    单选题
    If remote-controlled cars are more expensive than mechanical cars, and radio-controlled cars are more expensive than remote-controlled cars, which of the following statements must be true?
    A

    Mechanical cars are the most expensive.

    B

    Radio-controlled cars are the most expensive.

    C

    Radio-controlled cars are cheaper than remote-controlled cars.

    D

    Mechanical cars are more expensive than remote-controlled cars.


    正确答案： D
    解析：
    遥控车比机械车贵，无线电遥控车又比遥控车贵，因此可推知无线电遥控车是最贵的。

  • 第18题：

    多选题
    当p→q为真时，那么（）。
    A

    p真，ˉq真

    B

    p真，q假

    C

    ˉp假，q真

    D

    ˉp真，q真

    E

    p假，q假


    正确答案： A,E
    解析： 暂无解析

  • 第19题：

    单选题
    Which of the following is true according to the passage?
    A

    Not all the fires in the forests must be put out.

    B

    People‘s carelessness leads to dangerous fires.

    C

    Australia allows all the fires to burn naturally.

    D

    There are more fires in Russia than in the USA.


    正确答案： A
    解析：
    分析判断题。本文重点强调森林火灾的好处，一定的火灾是有必要的。A项说不必扑灭所有的森林火灾，符合文章的观点。B选项指出是人们的大意导致了严重的火灾，根据文章第二、三段的首句可知，引起火灾的原因是气候变化和传统消防，排除B项。根据文章第三段第二句“as result, countries like Australia allow more fires to burn naturally”可知，C项错误。D选项文章没有提及，所以排除。故选择A项。

  • 第20题：

    多选题
    Given two different character sets (A and B), which of the following must be true for A to be considered a strict superset of B?（）
    A

    A must contain all of the characters defined in B

    B

    A must be Unicode

    C

    The encoded values in A must match the encoded values in B for all characters defined in B

    D

    A must be a multibyte character set

    E

    The encoded values in A must match the encoded values in B for all numeric and alphabetic characters in B


    正确答案： E,D
    解析： 暂无解析

  • 第21题：

    单选题
    Which statement is true regarding the INTERSECT operator?（）
    A

    It ignores NULL values 

    B

    Reversing the order of the intersected tables alters the result 

    C

    The names of columns in all SELECT statements must be identical 

    D

    The number of columns and data types must be identical for all SELECT statements in the query 


    正确答案： D
    解析： 暂无解析

  • 第22题：

    问答题
    If M is a set of five numbers p, q, r, s and t, is the range of numbers in M greater than 5?　　(1) The average (arithmetic mean) of p, q, r, S, and t is 5.　　(2) p-r>5.

    正确答案： B
    解析：
    条件1不能判断M数集的极差；由p-r>5可知p、r间的距离大于5，故M的极差大于5，所以本题应选B项。

  • 第23题：

    多选题
    Which two statements are true about MLP interleaving? （）
    A

    It fragments and encapsulates all packets in a fragmentation header.

    B

    Packets smaller than the fragmentation size are interleaved between the fragments of the larger packets.

    C

    Packets larger than the fragmentation size are always fragmented, and cannot be interleaved, even if the traffic is voice traffic.

    D

    It fragments and encapsulates packets that are longer than a configured size, but does not encapsulate smaller packets inside a fragmentation header.


    正确答案： A,B
    解析： 暂无解析

相关内容