One question third grade One question for junior high school.

Because that was the first to be discovered, and there are signs of humans elsewhere dispersing from here.

There are a lot of questions like this, such as the origin of human beings and Asia, which somehow ran around the world.

Another example is that humans originated in Mongolia.

Now there is talk of the origin of mankind and Africa, and this is just a few or a few groups of boring and ignorant so-called scientists through the use of new technologies and new archaeological discoveries. So think for yourself which one is credible? The world is so big, and human beings run to all parts of the world before they have developed civilization, and then grow up separately?

So why is the place of origin of mankind the most backward? And why does Asia have a long history? And why is there still a big difference in race?

I just think it's boring to study the origins of man, it's as unexplainable as the formation of the universe, because no one can see it with their own eyes. Therefore, I advise you to find the answers in the book and add them to the exam paper, and don't study her.

Although the brain is small, it is more human-like than the chimpanzee's brain; Judging by the location of the foramen magnum at the base of the skull, he was able to walk upright. So, in 1925, he published an article proposing that Towne was a class located between apes and humans There are also major discoveries in Ethiopian archaeology, the earliest Australopithecus afarensis, which appeared less than 4 million 3 million years old, this species has a very small brain capacity, males are significantly larger than females, The skeleton of a young female Australopithecus called "Lucy" was unearthed in Ethiopia in 1974. Because the skeleton is relatively complete, it was possible to establish the walking form of Australopithecus.

No matter what race or country people in the world call their mother, the pronunciation is mama

The first is from the ancient ancestral migration sites 2 is the discovery of similarities between earthlings and people using modern scientific DNA.

The seventh answer is not bad

The earliest human beings found now seem to be the Bailian Cave people in China......

The independent evolution of each race is the most authoritative answer.

Because humans look very similar to African australopithecus.

Because of the discovery of mitochondrial Eve.

According to the study of the existing ape-man fossils, among the lifestyles expressed in the various stages of the development of the ape-man, the African ape-man is the most basic, that is, the so-called source-by-source. Therefore, scientists infer that human beings have carried out great migrations in ancient times, so that in the later evolution of human beings, various tribes with different regional climates were formed.

However, this is only a speculation, we can think about this problem according to the law of development of things, and it is difficult to explain such complex evolution and evolution with some data on a vast continent.

Please, you're asking about creatures or history!

Not really. What did humanity come from so far, and nothing has come of it so far! It's just that historians don't want everyone to be superstitious. That's why I'm looking for a cover to stabilize you!

There is this kind of question in the third year of junior high school, and I pour.

You also ask the person who asked this question how the human race became extinct.

The idea is right.

0 Heng was founded, apparently with two roots.

It is also correct to start writing greater than or equal to, because it is not said that the two are different.

Since it is said that there are two roots, it should be "greater than zero", not "greater than or equal to zero".

Because the original equation has two integer solutions.

So 8m+4 must be a square number and a multiple of 4.

I don't see this point of yours.

But I have a better suggestion, which is to use the sum of the two roots and the product of the two roots, if I am not mistaken, the sum of the two should be equal to 2 (m+1), and the product of the two roots is equal to m, and then we will discuss it. But I've been graduating from high school for n years, and I can't remember the relationship, so please check it yourself!

With y1-y2, we get y=--3 8)x+36-(1 8)xsquared 15 8x+59 2

1/8x^+12\8x+13/2

1/8(x-6)^+6

It can be seen that when x is equal to 6, the profit is the largest, and it can be seen from the title that before May Day, the closest to 6 is April, and when x = 4, y =

The window area is b and the floor area a, a>b

Daylight = b a

Daylight = (b+x) (a+x).

b+x）/（a+x）-b/a

a（b+x）-b（a+x）]/a（a+x）=(a-b)x/a（a+x）

0 daylighting conditions are getting better.

It must have gotten better because the base is larger than the fraction, and then if the base and fraction increase by the same amount, the proportional value will increase.

Set: the ground area is x, the window area is y, the lighting value is z, and the added value is a;

z=y/x，x>y，a>0；

y+a）/(x+a)>y/x;

Therefore, the lighting value has become larger, and the lighting conditions are better.

First, press the surface of the water and draw the symmetry point p of the airship' ，pp'The intersection point with the extension of the horizontal line where A is located is set to O.

Then: Angular p'AO=60°, angle PAO=45°So, PO=OA, P'0 = root number 3 * oa then: (op.)'+PO) 2 = 50 + PO yields: OP=100 (root number 3 - 1).