单选题a and b are positive, a is even and b is odd. Which of the following must also be odd?A abB a/bC a + 2bD baE (ab) a

题目
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

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更多“a and b are positive, a is even and b is odd. Which of the f”相关问题

  • 第1题：

    Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?()

    A.Unique

    B.Check

    C.Referential

    D.Informational


    参考答案：B

  • 第2题：

    A good advertisement often uses words__________people attach positive meanings.

    A.that
    B.which
    C.with which
    D.to which

    答案：D
    解析：
    “一people attach positive meanings”可理解为“people attach positive meanings to which”。attach…to意为“把……附在．……上”。故本题正确答案选D。

  • 第3题：

    A user has discovered that even though they are using the latest version of the anti-virus software,the computer is still being infected by a virus. Which of the following is the BEST solution for this problem?（）

    • A、Replace the computer.
    • B、Run chkdsk /f.
    • C、Update the virus signatures.
    • D、Run scandisk.

    正确答案:C

  • 第4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5题：

    单选题
    Which of the following is true?
    A

    All nicknames have a positive meaning.

    B

    All negatives have a negative meaning.

    C

    Nicknames are endearing.

    D

    All nicknames can be either positive or negative.


    正确答案： A
    解析：
    倒数第二段提及Not every nickname, however, is a complement and some can be downright rude and insulting“并非所有的昵称都表示赞赏，有些昵称甚至十分粗鲁或带有污辱性”，表明应该以辩证的态度看待昵称，选项D符合。

  • 第6题：

    单选题
    What is the definition of transverse metacenter?（）
    A

    The distance between the actual center of gravity and the maximum center of gravity that will still allow a positive stability

    B

    The point to which G may rise and still permit the vessel to possess positive stability

    C

    The sum of the center of buoyancy and the center of gravity

    D

    The transverse shift of the center of buoyancy as a vessel rolls


    正确答案： A
    解析： 暂无解析

  • 第7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8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9题：

    单选题
    Assuming an even transverse distribution of weight in a vessel，which condition could cause a list?（）.
    A

    Empty double-bottoms and lower holds，and a heavy deck cargo

    B

    Flooding the forepeak to correct the vessel's trim

    C

    Having KG smaller than KM

    D

    Having a small positive righting arm


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    How many positive integers less than 70 are equal to the product of a positive multiple of 5 and an even number?
    A

    4

    B

    6

    C

    9

    D

    10

    E

    11


    正确答案： D
    解析：
    All even multiples of 5 must be multiples of 10. So the multiples of 10 between 0 and 70 are 10, 20, 30, 40, 50 and 60. That’s 6 altogether.

  • 第11题：

    单选题
    A user has discovered that even though they are using the latest version of the anti-virus software,the computer is still being infected by a virus. Which of the following is the BEST solution for this problem?（）
    A

    Replace the computer.

    B

    Run chkdsk /f.

    C

    Update the virus signatures.

    D

    Run scandisk.


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    public void test（int x） {  int odd = x%2；  if （odd） {   System.out.println（“odd）；  } else {  System.out.println（“even”）；  }  }  Which statement is true？（）
    A

    Compilation fails.

    B

     “odd” will always be output.

    C

     “even” will always be output.

    D

     “odd” will be output for odd values of x， and “even” for even values.

    E

     “even” will be output for add values of x， and “odd” for even values.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Assuming an even transverse distribution of weight in a vessel，which condition could cause a list ________．

    A.Empty double-bottoms and lower holds，and a heavy deck cargo

    B.Flooding the forepeak to correct the vessel's trim

    C.Having KG smaller than KM

    D.Having a small positive righting arm


    正确答案：A

  • 第14题：

    public void test（int x） {  int odd = x%2；  if （odd） {   System.out.println（“odd）；  } else {  System.out.println（“even”）；  }  }  Which statement is true？（） 

    • A、Compilation fails.
    • B、 “odd” will always be output.
    • C、 “even” will always be output.
    • D、 “odd” will be output for odd values of x， and “even” for even values.
    • E、 “even” will be output for add values of x， and “odd” for even values.

    正确答案:A

  • 第15题：

    Which dependent object will get invalidated even if it is not affected by the table edefinition？（）

    • A、 packages
    • B、 triggers
    • C、 synonyms
    • D、 views

    正确答案:B

  • 第16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17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18题：

    单选题
    Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）
    A

    Unique

    B

    Check

    C

    Referential

    D

    Informational


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    If the sum of 4 consecutive positive integers is w, in terms of w, which of the following represents the sum of the next 4 consecutive positive integers?
    A

    w2+16

    B

    w+16

    C

    4w+16

    D

    4w+4

    E

    w+4


    正确答案： D
    解析：
    Let x, x+1, x+2, x+3, represent the 4 consecutive integers. Then, x+x+1+x+2+x+3=w or 4x+6=w. The next 4 consecutive positive integers will be：x+4, x+5, x+6, x+7. Their sum will be：4x+22=4x+6+16=w+16.

  • 第20题：

    单选题
    Which of the listed pumps is NOT a positive displacement pump?（）
    A

    Centrifugal

    B

    Reciprocating

    C

    Gear

    D

    Rotary


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Let Ω p be defined as p2/3-p for all positive integers, p. If Ωn = s, and s is a positive integer, which of the following is a possible value for s?
    A

    1

    B

    3

    C

    5

    D

    6

    E

    8


    正确答案： D
    解析：
    根据题干Ωn =n2 /3-n=s. n为正整数，且s为正整数；根据函数可知只有当n是3的倍数时，s才能为整数，否则如果n2 /3不是整数，s也不是整数。现在可以从符合条件的n的最小值3代入到函数中。当n=3时，n2 /3-n =32 /3-3 = 3-3 = 0 = s；当n=6时，n2 /3-n = 62 /3-6 = 12-6 = 6 = s。所以故选D。

  • 第22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23题：

    单选题
    The maximum angle at which the intact stability curves are valid for ship’s is the angle for（）.
    A

    the limit of positive stability

    B

    the limit of small-angle stability

    C

    maximum offset

    D

    downflooding


    正确答案： B
    解析： 暂无解析

  • 第24题：

    单选题
    The point to which your vessel’s center of gravity (G) may rise and still permit the vessel to have positive stability is called the（）.
    A

    metacentric point

    B

    metacenter

    C

    metacentric radius

    D

    tipping center


    正确答案： A
    解析： 暂无解析

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