Would you please have a look at (ω)?

Four students, A, B, C and D, went to the teacher to ask about the results of the idiom contest. The teacher said, you two are excellent, and two are excellent. Now I show A the results of B and C, and B the results of C and D. After reading it, A says to everyone: I don't know my results yet. According to the above information, then

A.B can know their grades, and B.D may know their grades.

C.b and d can know each other's grades. D. B and d can know their grades.

This fucking question, will it be covered by B at first sight, and then look at the analysis.

From the analysis of A's statement, we can know that both B and C are excellent and good, so D is also excellent and good. B knows his own result when he sees the result of C, and D knows his own result when he sees the result of A, so D is chosen.

You're fucking kidding. Is your topic that students can communicate with each other? (? ω? ) I didn't say how to push it. Can I use a conclusion without it, huh? ′ ︿ ? Why not go to heaven, why not stand shoulder to shoulder with the sun, kneel down and thank the answer-taker, which ruined my mathematics achievements for so many years and made me feel sad to brush my world outlook for two hours.

And there was another mystery before? The topic is as follows

The teacher's birthday is January B. Neither of the students knows the teacher's birthday. The teacher told A and B, and the teacher asked them if they knew him.

When is your birthday? (March 4th March 8th June 7th September 1 September 5th 65438+February1,65438+February 2nd 65438+February 8th. )

A said, if I don't know, of course B doesn't know. B said, I didn't know at first, but now I know. A said, I know, too

Please infer when the teacher's birthday is.

I mean, they must be talking nonsense. I don't know if you don't know. I know if you know. I don't care if you know or not. Get out of here Thank you mom for letting me choose liberal arts. Thank you (*? ︶? *)