[单选题]
The molecular mass of nitrogen is 14 times greater than3vy.d (ih bva4a.4 p2vltje-4npj1tn that of fdj 6ka s *1asrb,*ke:hydrogen. If the molecules in these two gases have tka: 6ea s,r*1dkf* jsbhe same rms speed, the ratio of hydrogen's absolute temperature to that of nitrogen is .