单选题In a triangle in which the lengths of two sides are 5 and 9, the length of the third side is represented by x. Which statement is always true?A x > 5B x < 9C 5≤x≤9D 4 < x < 14E 5≤ x < 14

题目
单选题
In a triangle in which the lengths of two sides are 5 and 9, the length of the third side is represented by x. Which statement is always true?
A

x > 5

B

x < 9

C

5≤x≤9

D

4 < x < 14

E

5≤ x < 14


相似考题
参考答案和解析
正确答案: B
解析:
In a triangle the length of any side is less than the sum of the lengths of the other two sides. If .the lengths of two sides are 5 and 9, and the length of the third side is x, then x<5+9 or x<14, 9<x+5 or 4<x. Since x < 14 and 4 < x, 4<x <14.
更多“单选题In a triangle in which the lengths of two sides are 5 and 9, the length of the third side is represented by x. Which statement is always true?A x 5B x 9C 5≤x≤9D 4 x 14E 5≤ x 14”相关问题
  • 第1题:

    以下( )表达式是不合法的。

    A.String x="Sky";int y=5;x + =y:

    B.String x="Sky":int y=5:if(x==y){}

    C.String x="Sky":int y=5:x=x+y:

    D.String x=null:int y=(x!=null) && (x.length( )>0)?x.length:0


    正确答案:B

  • 第2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3题:

    下面程序运行后,输出的结果是() 10 A=5:B=9 20 X=A-B 30 IF A>B THEN X=A+B 40 PRINT X 50 END

    • A、-4
    • B、5
    • C、9
    • D、4

    正确答案:A

  • 第4题:

    执行下列程序:CLEARX=5FOR I=1 TO 50IF X>=10EXITEND IFIF X%2=1X=X+5LOOPENDIFX=X-3ENDFOR?X显示X的值是()。

    • A、27
    • B、8
    • C、9
    • D、10

    正确答案:D

  • 第5题:

    Which two IP multicast addresses belong to the group represented by the MAC address of 0x01-00-5E-15-6A-2C? ()

    • A、 224.21.106.44
    • B、 224.25.106.44
    • C、 233.149.106.44
    • D、 236.25.106.44
    • E、 239.153.106.44

    正确答案:A,C

  • 第6题:

    Which two code fragments are most likely to cause a StackOverflowError?()

    • A、int []x = {1,2,3,4,5};for(int y = 0; y < 6; y++)    System.out.println(x[y]);
    • B、static int[] x = {7,6,5,4};static { x[1] = 8;x[4] = 3; }
    • C、for(int y = 10; y < 10; y++)doStuff(y);
    • D、void doOne(int x) { doTwo(x); }void doTwo(int y) { doThree(y); }void doThree(int z) { doTwo(z); }
    • E、for(int x = 0; x < 1000000000; x++) doStuff(x);
    • F、void counter(int i) { counter(++i); }

    正确答案:D,F

  • 第7题:

    多选题
    Which of the following equations are for lines which are perpendicular to the line y=2x+4?
    A

    2y +x = 5

    B

    2y –x = 3

    C

    x + 2y = 7

    D

    x – 2y = 4

    E

    4y +2x = 0


    正确答案: C,B
    解析:
    直线y=2x+4的斜率为2,所以与其垂直的直线的斜率为-1/2,故本题选择ACE三项。

  • 第8题:

    问答题
    A CEO is building an extra-wide garage in which to park his limousines. The garage is x feet wide, and at least two feet of space is required between each two cars and between the cars and the walls. Will all nine limousines fit in the garage?  (1) The average width of the limousines is the square root of x.  (2) x=100.

    正确答案: C
    解析:
    条件1中没有提到x的值;条件2中没有涉及车的宽度,故将两个条件综合可以计算出答案,故本题选C项。

  • 第9题:

    单选题
    If 4 and 11 are the lengths of two sides of a triangular region, which of the following can be the length of the third side?I. 5II. 13III. 15
    A

    I only

    B

    II only

    C

    I and II only

    D

    II and III only

    E

    I, II, and III


    正确答案: D
    解析:
    根据三角形三边关系可知,9<c<15,故本题选B项。

  • 第10题:

    单选题
    下列表达式中,比较结果为true的是()。
    A

    $x=5;$x==4;

    B

    $x=5;$x<>4;

    C

    $x=4.0;$x===4;

    D

    $x=4;$x<4;


    正确答案: B
    解析: 暂无解析

  • 第11题:

    多选题
    Which two of the following are NOT solutions of (x-5) (x-3) (x-9) (x+9) =0?
    A

    -9

    B

    -5

    C

    -3

    D

    3

    E

    5

    F

    9


    正确答案: D,A
    解析:
    要想(x-5) (x-3) (x-9) (x+9) =0,只需x-5=0,或x-3=0,或x-9=0,或x+9=0,因此x可以是5,或3,或9,或-9。选项中只有B、C不符合条件。

  • 第12题:

    单选题
    If two sides of a triangle are 4 and 5, then the third side cannot be ______.
    A

    2

    B

    3

    C

    7

    D

    8

    E

    10


    正确答案: E
    解析:
    The third side cannot be 10 because the sum of any two sides of a triangle must be greater than the third side.

  • 第13题:

    1÷2x3x4÷6÷4x5x8÷10÷6x7x12÷14÷9=( )。

    A.1/7
    B.1/6
    C.1/9
    D.1/10

    答案:C
    解析:
    原式=1/2×3×4×1/6×1/4×5×8×1/10×1/6×7×12×1/14×1/9=1/9。故选C。

  • 第14题:

    下列表达式中,比较结果为true的是()。

    • A、$x=5;$x==4;
    • B、$x=5;$x<>4;
    • C、$x=4.0;$x===4;
    • D、$x=4;$x<4;

    正确答案:B

  • 第15题:

    下列哪条语句是正确的()

    • A、[12;34];B=[3;7];A.*B;
    • B、A=cell(2,3);A(1,2)=[4;5]
    • C、A=[2357;9461;7325];B=[17;05];A(2:end,2:2:end)
    • D、x=-5:5;y=-5:5;z=x.*x-y.*y;surf(x,y,z)

    正确答案:C

  • 第16题:

    以下创建数组的方式错误的是()

    • A、shortx[];x={1,2,3,4,5,6};
    • B、shortx[]=newshort[6];x[0]=9;x[1]=8;x[2]=7;x[3]=6;x[4]=5;x[5]=4;
    • C、shortx[]=newshort[6];intlen=x.length;for(inti=0;i
    • D、short[][]x={{1,2},{3,4,5},{6,7,8,9}};

    正确答案:A

  • 第17题:

    设随机变量X与Y相互独立,已知X服从区间(1,5)上的均匀分布,Y服从参数λ=5的指数分布,则D(3X-5Y)等于().

    • A、5
    • B、9
    • C、10
    • D、13

    正确答案:D

  • 第18题:

    设X为随机变量,E(X)=2,D(X)=5,则E(X+2)2=()

    • A、4
    • B、9
    • C、13
    • D、21

    正确答案:D

  • 第19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20题:

    单选题
    If x is an integer and y=4x+3, which of the following cannot be a divisor of y?
    A

    5

    B

    6

    C

    7

    D

    9

    E

    23


    正确答案: A
    解析:
    将几个选项代入反解x可知,y的值不可能为6,故本题选B项。

  • 第21题:

    单选题
    If x is an integer and y=7x+11, what is the greatest value of x for which Y is less than 50?
    A

    7

    B

    6

    C

    5

    D

    4

    E

    3


    正确答案: A
    解析:
    解答这道题的快速方法是把选项中的数值依次代入方程式,计算y的数值,直到满足条件y<50为止,即可得出答案。

  • 第22题:

    单选题
    以下创建数组的方式错误的是()
    A

    shortx[];x={1,2,3,4,5,6};

    B

    shortx[]=newshort[6];x[0]=9;x[1]=8;x[2]=7;x[3]=6;x[4]=5;x[5]=4;

    C

    shortx[]=newshort[6];intlen=x.length;for(inti=0;i

    D

    short[][]x={{1,2},{3,4,5},{6,7,8,9}};


    正确答案: D
    解析: 暂无解析

  • 第23题:

    单选题
    f(x)=7x5+6x4-9x2+13的系数模2之后的等式是什么?()
    A

    f(x)=x5+x2

    B

    f(x)=x5-x2+2

    C

    f(x)=x5-x2+3

    D

    f(x)=x5+x2+1


    正确答案: D
    解析: 暂无解析

  • 第24题:

    单选题
    In a triangle in which the lengths of two sides are 5 and 9, the length of the third side is represented by x. Which statement is always true?
    A

    x > 5

    B

    x < 9

    C

    5≤x≤9

    D

    4 < x < 14

    E

    5≤ x < 14


    正确答案: A
    解析:
    In a triangle the length of any side is less than the sum of the lengths of the other two sides. If .the lengths of two sides are 5 and 9, and the length of the third side is x, then x<5+9 or x<14, 9<x+5 or 4<x. Since x < 14 and 4 < x, 4<x <14.