There Is Always a CP to Coax Me to Study

I am studying like crazy, so I have to rely on some CP to replenish my energy. If you write multiple pairs, some CPs will have children. No logic, just to vent the pressure of studying The first pair of cp: Carbon dioxide (1) and carbon monoxide (0) Campus, no children Carbon monoxide lacks an O and can become carbon dioxide, so it is written that carbon monoxide and carbon dioxide are similar in many ways, but the family of carbon monoxide lacks a love than carbon dioxide. There will be other CPs in the future, mainly because I saw where I learned something and I went crazy. Maybe it was just to make me laugh. Purpose: Learn to learn happily