(较难)对室温下定体摩尔热容<img src="https://static.zxtiku.com/wangke/imgs/topic/47db039d0740fd6bf55a170223129ba4.jpg"/>的理想气体,在等压膨胀情况下,系统对外所做的功与系统从外界吸收的热量之比<img src="https://static.zxtiku.com/wangke/imgs/topic/34e06084e224d889a4c18f90c220477f.jpg"/>( )。 A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/20c4494504bffb8a1a3f3209becdf416.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/5ff5a7e08c155168b28dc1336c582e4e.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/8e50bb3264817fa9d14506126c453595.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/92f78f0f4540adc6317070db141b693d.jpg"/>