处于平衡状态的理想气体，其分子的速率分布曲线如 图,设<img src="https://static.zxtiku.com/wangke/imgs/topic/516d1e366ca4f3737e96da4eeb6aa66f.jpg"/>表示最概然速率，<img src="https://static.zxtiku.com/wangke/imgs/topic/fc5a949ab2f597f0074e00cc8029b81d.jpg"/>表示速率分布在<img src="https://static.zxtiku.com/wangke/imgs/topic/92d1fe538b8fa0517b4f19977da89943.jpg"/>到<img src="https://static.zxtiku.com/wangke/imgs/topic/29c9b6b2a93f5014393db7a1e0c1f315.jpg"/>之间的分子数占总分子数的百分率。当温度降低时,则<img src="https://static.zxtiku.com/wangke/imgs/topic/d1f786318d6667aaab849c36dcdca4ee.jpg"/><br/> 注：<img src="https://static.zxtiku.com/wangke/imgs/topic/cee4bfc9213c65334e2022a0b4f6dc6c.jpg"/>, <img src="https://static.zxtiku.com/wangke/imgs/topic/27e9f773e4dd12eca328857f51570487.jpg"/>. 以上选项哪个正确？<br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/516d1e366ca4f3737e96da4eeb6aa66f.jpg"/>减小，<img src="https://static.zxtiku.com/wangke/imgs/topic/fc5a949ab2f597f0074e00cc8029b81d.jpg"/>也减小 <br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/516d1e366ca4f3737e96da4eeb6aa66f.jpg"/>增大，<img src="https://static.zxtiku.com/wangke/imgs/topic/fc5a949ab2f597f0074e00cc8029b81d.jpg"/>也增大<br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/516d1e366ca4f3737e96da4eeb6aa66f.jpg"/>减小，<img src="https://static.zxtiku.com/wangke/imgs/topic/fc5a949ab2f597f0074e00cc8029b81d.jpg"/>增大<br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/516d1e366ca4f3737e96da4eeb6aa66f.jpg"/>增大，<img src="https://static.zxtiku.com/wangke/imgs/topic/fc5a949ab2f597f0074e00cc8029b81d.jpg"/>减小