Can a giraffe bark? If so, what kind of sound is it? If not, why?

Can a giraffe bark? If so, what kind of sound is it? If not, why?

Some people say that giraffes are dumb and never bark; others say that giraffes don't have vocal cords, so they can't bark. In fact, neither of these two statements is true. Giraffes not only have vocal cords, but also bark. So, why don't they bark? This is because giraffes have special vocal cords, with shallow grooves in the middle, so it's hard to make sound

If the vector OP = 3, the vector om - the vector OA - the vector ob is written as the vector MP = x, the vector Ma + the vector MB, then x =, y =

Vector OP = 3 vector om vector OA vector ob
Vector OP vector om = 2 vector om vector OA vector ob
Vector OP vector om = (vector om vector OA) + (vector om vector OB)
Vector MP = vector am + vector BM
So vector MP = - vector ma - vector MB,
X=-1,y=-1.

How much more is the smallest sum than the smallest prime

The smallest composite number is 4, the smallest prime number is 2, (4-2) / 2 = 100%

If the lengths of the two sides of a triangle are 7 and 2, and its circumference is odd, then the length of the third side is______ ．

Let the length of the third side of the triangle be xcm. From the meaning of the question, we can get: 7-2 < x < 7 + 2, that is, 5 < x < 9, ∵ the perimeter is odd, ∵ x = 6,8, so the answer is: 6,8

The greatest common divisor and the least common multiple of 8.16 and 24

The greatest common divisor is [8], and the least common multiple is [48]

Given that the inclination angle of the line L is twice that of the line 2x-y + 1 = 0, then the slope of the line ()

Let the inclination angle of the straight line 2x-y + 1 = 0 be the angle α
Then Tan α = 2
So the slope of line L:
k=tan2α=2tanα/(1-tan²α)=4/(1-4)=-4/3

_______ ,she__ He likes eggs, bananas and apples for breakfast!

At breakfast, she likes to eat egg, banana and apples
At breakfast,she likes eat ing eggs,bananas and apples
Ask me if you have any questions

Y = x ^ 2 - [M-3] x-m. when m is the value, the distance between the two intersections of the parabola and x-axis is equal to 3;

M = 0 or 2
This parabola is a quadratic function
According to Weida's theorem, X1 + x2 = M-3, x1x2 = - M
The distance between the two intersections of the parabola and the X axis is | x1-x2|
(x1-x2)²=(x1+x2)²-4x1x2=3² =9
So M & sup2; - 2m + 9 = 9
M = 0 or 2

Y = 2x ^ 3-3x ^ 2 seeking monotone interval and extremum

y=2x^3-3x^2
y'=6x^2-6x=0
x(x-1)=0
X = 0 or x = 1
The extreme point is x = 0 or x = 1
y'=6x^2-6x=6x(x-1)
When y '> - 0
That is 6x (x-1) > 0
Get x > 1 or X1 or X

The parameterized ordinary equation needs the whole process by substitution method X = 1-3T, y = 4T

x=1-3t y=4t
x-1=-3t
y=4t
Division of two formulas
(x-1)/y=-3/4
4x+3y-4=0