单选题容积恒定的容器内盛有一定量的某种理想气体，分子的平均自由程为<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23817971_0.png">，平均碰撞频率为<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23817971_0_1.png">。若气体的温度降低为原来的1/4倍时，此时分子的平均自由程<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23817971_0_2.png">和平均碰撞频率<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23817971_0_3.png">为（　　）。<br/> <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/23817971_0_4.png">