It is said that N college students were stumped by this question

I think it's iron.

Because no matter how much cotton you put in, the weight is also very light.

So, I'm going to press 5 million pieces of cotton on you, do you think it's heavy? Light!

I'll put a pound of iron with you, you think it's a bit heavy, right?

So I think it's b

a;However, this question was obviously entered by hand;

The original question is kilograms, and the answer is c

The initial definition of kilogram is a unit of mass. 1 kilogram is equal to 1 kilogram.

But the kilogram is not a unit defined by scientific standards, but a unit that people use in their daily lives at Nissan.

Due to various factors such as air buoyancy in daily life, uneven gravitational field of the earth, and it is impossible to create an experimental environment in life.

So actually the kilogram is the definition of this unit in real life.

It has evolved into a unit that approximates gravity rather than mass.

For example, we define one kilogram of cotton, one kilogram of water-filled pork, and one kilogram of styrofoam. Even a kilogram of gold.

It's all weighed directly.

And none of them actually has a mass equal to 1 kilogram.

So now the definition of 1 kg is:

Object A is subject to the gravitational force of 1 kilogram of objects under the gravitational force of the Earth's surface.

Then we say that object A has 1 kg.

If it is not strictly to convert:

1 ton 1000 kg 1000 kg 2000 kg.

The density of the substance is different, and the weight is also different.

1 liter of water weighs 1 kg.

**: 1 liter = kilogram (1 ton = kiloliter = barrel).

Gasoline: 1 liter = kilogram Kerosene: 1 liter = kilogram.

Light diesel oil: 1 liter = kilogram.

Heavy diesel oil: 1 liter = kilogram.

1 liter of distilled spirits = kilograms.

kg is the English abbreviation of kilograms, 1kg = 1 kg.

The city system is 10 taels (the old system is 16 taels for 1 catty), and two catties are equal to one kilogram.

So the cotton weighs , which is a

a!Absolutely! Because don't look at cotton light! It depends on the portion! If the units are the same, then the area of iron is less than cotton! Pick me!

It must be a!

100 kg = 200 kg!

Those who chose were all brain-dead

Yes a. Although in life cotton is very light, iron is very heavy. However, this is a comparison between 100 kilograms and 100 kilograms, and the unit kilogram is larger than kilograms. So it's cotton heavy.

A is that right? The unit is different.

The top and bottom tend to 0 at the same time, and Lobida can find a derivative.

Replace with the equivalent infinitesimal with e x 1 x, (1 x) 1 x 2, substituting the simplification, and obtaining the original limit 1 2.

It's been too long to graduate, this is a linear algebra problem should read the book, you are also very simple, I feel that this question is not very difficult, but I forgot the basic consensus and solution ideas, if you look at the book and tell you the answer.

The cost of 15 yuan and the change of 29 yuan must have been lost.

After that, the 50 yuan for the next door is counted.

The total is 50 + 29 + 15 = 94 yuan.

It can be replaced by the Ropita rule, or the equivalent infinitesimal limit, the original limit 1 2.

I don't know how to ask again.

I'm a college student and I can do it.

How to jump high numbers.

Where did it go?

Answer: (Many college students) Bi Chunshan later tasted the bitter fruit of the fact that some universities blindly added various popular majors of this Huai, and rarely took the responsibility of long-term planning for the future of the country and the nation, and this reason caused a new round of "brain-body upside down" phenomenon in society. (Reasonable connection is sufficient).