多选题Which of the following points are on the straight line through (1, 4) and (3, -2)? (Indicate all of the answer choices that apply.)A(2, 1)B(0, 5)C(4, -5)D(-1, 8)E(15, 5)

题目
多选题
Which of the following points are on the straight line through (1, 4) and (3, -2)? (Indicate all of the answer choices that apply.)
A

(2, 1)

B

(0, 5)

C

(4, -5)

D

(-1, 8)

E

(15, 5)


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更多“多选题Which of the following points are on the straight line through (1, 4) and (3, -2)? (Indicate all of the answer choices that apply.)A(2, 1)B(0, 5)C(4, -5)D(-1, 8)E(15, 5)”相关问题
  • 第1题:

    有以下程序:

    A.1,2,3,4,5,6,7,8,9,0,

    B.0,9,8,7,6,5,1,2,3,4,

    C.0,9,8,7,6,5,4,3,2,1,

    D.1,2,3,4,9,8,7,6,5,0,


    正确答案:D
    fun()函数的功能是对数组a[]的元素从大到小进行排序。

  • 第2题:

    ote the following structures in your database server: 1:Extents 2:OS Blocks 3:Tablespace  4:Segments  5:Oracle Data Block  Which option has the correct arrangement of these structures from the smallest to the largest()

    • A、2, 5, 1, 4, 3
    • B、1, 2, 3, 4, 5
    • C、5, 2, 1, 3, 4
    • D、2, 1, 5, 4, 3

    正确答案:A

  • 第3题:

    Given the following code:     1) public void modify() {     2) int i, j, k;     3) i = 100;     4) while ( i > 0 ) {     5) j = i * 2;  6) System.out.println (" The value of j is " + j );     7) k = k + 1;     8) i--;     9) }  10) }  Which line might cause an error during compilation?()   

    • A、 line 4
    • B、 line 6
    • C、 line 7
    • D、 line 8

    正确答案:C

  • 第4题:

    Which is the earliest line in the following code after which the object created on the line marked (0) will be a candidate for being garbage collected, assuming no compiler optimizations are done? ()  public class Q76a9 {   static String f() {   String a = "hello";   String b = "bye"; // (0)   String c = b + "!"; // (1)   String d = b;  b = a; // (2)   d = a; // (3)   return c; // (4)  }   public static void main(String args[]) {   String msg = f();   System.out.println(msg); // (5)   }   }  

    • A、The line marked (1).
    • B、The line marked (2).
    • C、The line marked (3).
    • D、The line marked (4).
    • E、The line marked (5).

    正确答案:C

  • 第5题:

    多选题
    The ratio of two quantities is 4 to 5. If each of the quantities is increased by 3, which of the following could be the ratio of these two new quantities? (Indicate all answer choices that apply.)
    A

    7/8

    B

    11/13

    C

    23/28


    正确答案: C,B
    解析:
    由于题目中两个数字的具体数值不确定,因此任何符合题干条件的数值都可以,经验算,选项A, B, C均符合题意。

  • 第6题:

    多选题
    For this question, indicate all of the answer choices that apply. If 0
    A

    x < 1/x

    B

    -x < x

    C

    x2 < x3

    D

    x2 < x

    E

    x < x+2


    正确答案: A,B,D,E
    解析:
    取x=1/2,代入验证可知ABDE四项是正确的。

  • 第7题:

    单选题
    Which of the following choices could be equal to set Z ifX = {2, 5, 6, 7, 9} and Y = {2, 5, 7}X ∪ Y ∪ Z = {1, 2, 3, 4, 5, 6, 7, 8, 9}X ∩ Z = {2, 6}Y ∩ Z = {2}
    A

    Z= {1, 4, 8}

    B

    Z= {1, 3, 8}

    C

    Z= {1, 3, 4, 8}

    D

    Z= {1, 2, 3, 4, 6, 8}

    E

    Z= {1, 2, 3, 5, 6, 8}


    正确答案: B
    解析:
    We know that: X = {2, 5, 6, 7, 9} and Y = {2, 5, 7}, XYZ = {1, 2, 3, 4, 5, 6, 7, 8, 9}. This tells us that Z must contain {1, 3, 4, 8} because these elements are in the union of X, Y, and Z but not in set X and not in set Y.
    We also know that: XZ = {2, 6}, YZ = {2}. This tells us that Z must also contain {2, 6}. Only choice D contains all these elements. Z = {1, 2, 3, 4, 6, 8}

  • 第8题:

    单选题
    Given the following code fragment:      1) String str = null;  2) if ((str != null) && (str.length() > 10)) {     3) System.out.println("more than 10");     4) }  5) else if ((str != null) & (str.length() < 5)) {     6) System.out.println("less than 5");     7) }  8) else { System.out.println("end"); }   Which line will cause error?()
    A

     line 1

    B

     line 2

    C

     line 5

    D

     line 8


    正确答案: C
    解析: 此题需要将代码仔细看清楚,查询没有逻辑错误,if …else的使用没有问题,也没有拼写错误,错误在于第5行的“与”操作符的使用,逻辑操作符(logical operator)的“与” 应该是&&,而&是位逻辑操作符(bitwise logical operator)的“与”,使用的对象不一样,逻辑操作符的“与”的左右操作数都应该是布尔型(logical boolan)的值,而位逻辑操作符的左右操作数都是整型(integral)值。

  • 第9题:

    单选题
    Which is the earliest line in the following code after which the object created on the line marked (0) will be a candidate for being garbage collected, assuming no compiler optimizations are done? ()  public class Q76a9 {   static String f() {   String a = "hello";   String b = "bye"; // (0)   String c = b + "!"; // (1)   String d = b;  b = a; // (2)   d = a; // (3)   return c; // (4)  }   public static void main(String args[]) {   String msg = f();   System.out.println(msg); // (5)   }   }
    A

    The line marked (1).

    B

    The line marked (2).

    C

    The line marked (3).

    D

    The line marked (4).

    E

    The line marked (5).


    正确答案: D
    解析: 暂无解析

  • 第10题:

    单选题
    Line l passes through the origin and is perpendicular to the line given by the equation 2x + y = 8. Which of the following points is NOT on line l?
    A

    (-4, -2)

    B

    (-1,1)

    C

    (2,1)

    D

    (4,2)

    E

    (7,3.5)


    正确答案: A
    解析:
    2x+y=8,所以y =-2x + 8,因为函数是斜截式且斜率为-2。垂直于x-y平面的的直线的斜率互为反倒数。所以斜率Line1的斜率为1/2,又因为Line l经过原点且与y =-2x + 8垂直。所以Line 1为y =(1/2)x。以上四个选项中可知只有B点在Line l上。

  • 第11题:

    单选题
    For which set of numbers do the average, median, and mode all have the same value?
    A

    2, 2, 2, 2, 4

    B

    1, 3, 3, 3, 5

    C

    1, 1, 2, 5, 6

    D

    1, 1, 1, 2, 5

    E

    1, 1, 3, 5, 10


    正确答案: A
    解析:
    Eliminate choice A. because the mode is 2 but the average (mean) of 2, 2, 2, 2, and 4 must be greater than 2. Eliminate choices C., D., and E. because the mode in each case is 1 but the average (mean) in each of these answer choices must be greater than 1. In choice B. the mode is 3, the average (mean) of 1,3,3,3, and 5 is (1+3+3+3+5)/5 =3 and the median is 3 since two values (1 and 3) are less than or equal to 3 and two other values (3 and 5) are equal to or greater than 3.

  • 第12题:

    多选题
    Which of the following are factors of 240? (Indicate all of the answer choices that apply.)
    A

    6

    B

    9

    C

    12

    D

    20

    E

    36

    F

    45


    正确答案: D,B
    解析:
    将240分解质因子得到,240 = 24 × 10 = 6 × 4 × 10=2 × 3 × 2 × 2 × 5× 2,所以本题选择ACD三项。

  • 第13题:

    切片操作list(range(6))[::-1]()

    • A、[0,1,2,3,4,5]
    • B、[5,4,3,2,1,0]
    • C、[1,2,3,4,5]
    • D、[5,4,3,2,1]

    正确答案:B

  • 第14题:

    下列属于十进制作数码的是:()

    • A、0、1、2、3、4、5、6、7
    • B、0、1
    • C、0、1、2、3、4、5、6、7、8、9
    • D、0、1、2、3、4、5、6

    正确答案:C

  • 第15题:

    Given the following code fragment:      1) String str = null;  2) if ((str != null) && (str.length() > 10)) {     3) System.out.println("more than 10");     4) }  5) else if ((str != null) & (str.length() < 5)) {     6) System.out.println("less than 5");     7) }  8) else { System.out.println("end"); }   Which line will cause error?()    

    • A、 line 1
    • B、 line 2
    • C、 line 5
    • D、 line 8

    正确答案:C

  • 第16题:

    Which command displays the results of a loopback test you executed on a CT3 line module in slot 5,port 0,t1 number 4?()

    • A、 show interface 5/0:4
    • B、 show interface 5/0:4/1
    • C、 show controllers t3 5/0:4
    • D、 show controllers t3 5/0:4/1

    正确答案:C

  • 第17题:

    多选题
    Triangle PQR is isosceles and ∠PQR measures 50°. Which of the following could be the measure of ∠PRQ? (Indicate all of the answer choices that apply.)
    A

    60°

    B

    65°

    C

    80°

    D

    100°

    E

    130°


    正确答案: D,E
    解析:
    因为⊿PQR为等腰三角形,所以当∠PQR为顶角时,∠PRQ=65°;当∠PQR为底角时,∠PRQ=80°,故本题选择BC。

  • 第18题:

    单选题
    ote the following structures in your database server: 1:Extents 2:OS Blocks 3:Tablespace  4:Segments  5:Oracle Data Block  Which option has the correct arrangement of these structures from the smallest to the largest()
    A

    2, 5, 1, 4, 3

    B

    1, 2, 3, 4, 5

    C

    5, 2, 1, 3, 4

    D

    2, 1, 5, 4, 3


    正确答案: A
    解析: Oracle存储模型,逻辑结构在左,物理结构在右。  逻辑结构由大到小database-->tablespace-->segment-->extent-->oracle data block 
    1、数据库是由多个表空间组成。  
    2、每个表空间只属于一个数据库,包含一个或多个数据文件,每个数据文件只属于一个表空间, 
    3、每个段包括一个或多个extents区  
    4、extent(区),由相邻的数据块的组成。 
    5、块BLOCK:是数据库中最小的I/O单元,db_block_size

  • 第19题:

    多选题
    Select all the values of x which make the following true: 2x4 = 7x3 + 4x2.
    A

    0

    B

    -1/2

    C

    -1

    D

    2

    E

    4


    正确答案: B,D
    解析:
    因为2x4 = 7x3 + 4x2,所以x2(2x2-7x-4)=0,所以x=0或-1/2或4,所以本题应选ABE三项。

  • 第20题:

    单选题
    Among all the comments, which of the following choices brings in authoritative sources in their discussion?
    A

    Comment 1 and Comment 2.

    B

    Comment 3 and Comment 5.

    C

    Comment 1 and Comment 7.

    D

    Comment 4 and Comment 6.


    正确答案: D
    解析:
    由文章中的7个评论可知,评论1、5、7中都包含比较权威的人士Brene Brown、Benjamin Franklin、Mark Leary,所以这三个评论比较权威,故C项为正确答案。

  • 第21题:

    单选题
    Which of the following firing order may be used for an 6 cylinder engine?()
    A

    1-2-3-4-5-6

    B

    1-2-3-6-5-4

    C

    1-5-3-6-2-4

    D

    1-3-4-5-6-2


    正确答案: B
    解析: 暂无解析

  • 第22题:

    单选题
    Given the following code:     1) public void modify() {     2) int i, j, k;     3) i = 100;     4) while ( i > 0 ) {     5) j = i * 2;  6) System.out.println (" The value of j is " + j );     7) k = k + 1;     8) i--;     9) }  10) }  Which line might cause an error during compilation?()
    A

     line 4

    B

     line 6

    C

     line 7

    D

     line 8


    正确答案: B
    解析: 这个问题在前面有关变量的类型及其作用域的问题中讨论过,局部变量在使用前必须显式初始化,而代码中的变量k在使用前没有。

  • 第23题:

    多选题
    Which of the following points are on the straight line through (1, 4) and (3, -2)? (Indicate all of the answer choices that apply.)
    A

    (2, 1)

    B

    (0, 5)

    C

    (4, -5)

    D

    (-1, 8)

    E

    (15, 5)


    正确答案: E,A
    解析:
    通过点(1, 4)和(3, -2)的直线为y - 4=-3(x- 1),故可知AC在直线上,故本题选择AC两项。

  • 第24题:

    多选题
    If n = 6 × 15, which of the following are prime factors of n? (Indicate all of the answer choices that apply.)
    A

    2

    B

    3

    C

    7

    D

    9

    E

    15


    正确答案: C,A
    解析:
    因为n = 6×15=2×3×3×5,所以n的质因数为2, 3, 5,所以本题选AB。