单选题容器内储有一定量的理想气体，若保持容积不变，使气体的温度升高，则分子的平均碰撞频率<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23819742_0.png">和平均自由程<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23819742_0_1.png">的变化情况为（　　）。<br/> <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23819742_0_2.png">