Joke Collection Website - Talk about mood - Quasicrystal 1 flying from outer space, what is introduced in the first paragraph, please elaborate? (4 points) 2. What is the main explanation method for the first paragraph?

Quasicrystal 1 flying from outer space, what is introduced in the first paragraph, please elaborate? (4 points) 2. What is the main explanation method for the first paragraph?

The first paragraph: Quasicrystals have a special structure, unlike ordinary crystals.

Description method: number of columns and contrast effect: quasicrystals can be introduced in more detail.

The second paragraph: Quasicrystals are likely to come from outside the earth, but how to form them remains to be verified.

Description: column number function: quasicrystals are more mysterious

The third paragraph: The meteorite containing quasicrystals is probably caused by a high-speed impact event on the planet in extreme environment.

Objective: To introduce quasispar and let more people know about it.