下列物质参加氧化还原反应时,硫元素只能被氧化的是( ) A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/225e8509a4a7725fe700653b1fe6cc17.jpg"/><img src="https://static.zxtiku.com/wangke/imgs/topic/b3369d0036ac89528023668d01044e73.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/7cabd0e91d69f83411a2261c2efb906d.jpg"/><img src="https://static.zxtiku.com/wangke/imgs/topic/b3369d0036ac89528023668d01044e73.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/d3da39113b6318d0fa7e328eea7f5c29.jpg"/><img src="https://static.zxtiku.com/wangke/imgs/topic/b3369d0036ac89528023668d01044e73.jpg"/> D. <br/> 浓 <img src="https://static.zxtiku.com/wangke/imgs/topic/546508028904a5959cdbd18815290469.jpg"/>