With the increase of benzene ring, the vapor pressure of polycyclic aromatic hydrocarbons decreases and they finally exist in the form of ___.
A、gaseous state;
B、liquid state;
C、solid state;
D、mixed state
发布时间:2025-03-15 23:02:03
A、gaseous state;
B、liquid state;
C、solid state;
D、mixed state