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如下图所示装置,密闭容器内分别在可移动的活塞两边充入空气(已知空气体积占整个容器...

如下图所示装置,密闭容器内分别在可移动的活塞两边充入空气(已知空气体积占整个容器容积的l/4)和H2、O2的混合气体,在标准状态下,若将H2、O2的混合气体点燃引爆.活塞先左弹,恢复原温度后,活塞右滑停留于容器的中央.则原来H2、O2的体积比最接近于                       (    )

说明: 6ec8aac122bd4f6e

       A.2:7                   B.5:4                   C.2:1                   D.7:2

 

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