All of Liu Jia s good classmates Why can t they form a collection

This can form a fuzzy collection. Use the membership function to determine whether you are a good classmate, and you can only learn it in college.

None of the elements of the high school collection can be vague and must be definitive.

Addendum: Your understanding is very interesting, it shows that you are a person who loves to use your brain, which is very good.

My understanding can be explained in this way, for Liu Jia, the good classmates in his mind can only be determined in a certain period of time, for example, with the growth of age, the change of the environment, and the increase of experience, the standard of good classmates in his mind will definitely change, so that the collection of his good classmates is also a collection that will change at any time, so this is a vague collection. In high school, all of them are definite sets, and within the scope of high school, "Liu Jia's good classmates" cannot constitute a set. Do you understand?

That's because for Liu Jia, that is a good classmate, but may be a bad classmate in the eyes of others.

The uncertainty of the elements that make up the set actually means that people can have different views and opinions, and opinions and opinions can not be consistent.

In Liu Jia's opinion, it is the best answer, and in the eyes of others, you can have one more element or one less element.

This is where the element is indeterminate

So as above !

Good classmates, how do you know for sure? There is no clear standard for determining it, maybe you think that Xiao Wang is his good classmate, maybe the teacher thinks that Xiao Wang is not his good classmate ......

So there should be a clear standard for the collection.

For example, China's great rivers are not assembled.

For example, cute animals in a zoo are not collections.

Because the range of 'good' is uncertain.

Let Liu Jia's score be x, which can be obtained according to the meaning of the question.

x-(78+79+82+91+x) 5=6 solves the equation to get x=90

So Liu Jia's results are in second place!

Hello. The car generator is composed of the following elements.

Pulleys, fan blades, front and rear shells, coils, magnetic claws, copper rings, bearings, stator, rectifiers, composition.

It is composed of active machine, generator, excitation system, protection system and power output system.

Bangs and eyebrows are quiet.

Jia'er is surrounded by shadows.

I wish to love flowers and butterflies in this life.

Love is long and enviable.

You and I are in love with each other.

Hope like, Milanese cat haunts, o(o

【Liu】The sea bends in front of the forehead.

Wonderful.

The two of us are destined to be close to each other.

Love] seeks to be with each other forever.

When will you and I be married?

I've seen two beautiful women named Liu Jia. So now I think it's a good name.

It's not very good-looking, and the person looks average.

Assuming that there are a total of x books, and the efficiency of the teacher and Liu Jia is constant, then the ratio of their efficiency is constant, then the equation can be listed and x, which is 480 books.

Let the total number of books be x, Liu Jia's repair speed is v1, and Mr. Wang's repair speed is v2:

The first patch time is equal: 36 v1 = (x 8) v2....

The second patch time is equal: (3x 10) v1=(x 2) v2....

From: v2 v1=5 3

From: x=36*8*(v2 v1)=12*8*5=480