题目

请把以下从模块四（Unit 3--Unit 5)课本中抽选出来的句子补充完整 (要求与原文完全一致)。 As Victor Hugo once said, Laughter is the sun that drives winter from the human face, and up to now nobody has been able to do this better than Charlie Chaplin. He brightened the lives of Americans and British through two world wars and the hard years in between. He made people laugh at a time, so they could feel more content with their lives. Charlie Chaplin wrote, directed and produced the films he starred in. In 1972 he was given a special Oscar for his outstanding work in f羰基硫(COS)可作为一种粮食熏蒸剂，能防止某些昆虫、线虫和真菌的危害。在2L恒容密闭容器中，将CO和H2S混合加热并达到下列平衡：CO(g)＋H2S(g)COS(g)＋H2(g) K＝0.1，反应前CO物质的量为10mol，2min达到平衡后CO物质的量为8mol。下列说法正确的是（ ）A.升高温度，H2S浓度增加，表明该反应是吸热反应B.通入CO后，正反应速率逐渐增大C.反应前H2S物质的量为7molD.CO的平均反应速率为0.5mol/(L·s)