複選題22. The velocity probability of Maxwell-Boltzmann distribution in one-direction is expressed as: . Which of the following statement about Maxwell- Boltzmann distribution at a finite T is true? (A) The most-probable velocity for a one-dimensional gas velocity distribution is zero. (B) The Maxwell-Boltzmann speed (three dimensions) distribution approaches zero at high speeds. (C) The Maxwell-Boltzmann speed (three dimensions) distribution approaches zero at low speed. (D) The total energy of one mole perfect gas according to the Maxwell-Boltzmann distribution is 1.5RT. (E) Most-probable speed ＞ Mean speed ＞ Root mean square speed.