What did scientists find? These should be extracurricular expansion. You don't need to recite the exam. There is generally no need for an exam. As for the isobaric change, you should remember it, because it is a condition for solving the problem: the pressure is constant during the change.

The math problem should be 2+2-3+5.

Y = x 3+5x+1Let y=0, and the value of x is the intersection with the X axis.

Well, there are many things like chemicals, such as chemical properties, reactions, conditions and phenomena.

Physics pays more attention to understanding, derivation of formulas and conditions for establishment.