选修八第四单元的写作是如何续写戏剧，要求同学们接着课本的话剧讨论下面发生的故事，并尝试写作。我们来点评一下同学们的习作：　　A ......

A male crab met a female crab and asked her to marry him. She noticed that he was walking straight instead of sideways. ......

A new generic reaction in the form of PC_i→PC_m+[i,m]→PC_m+λi,m coke+surplusage has been proposed for describing the ......

固体氧化物燃料电池是一种有前途的分布式电源。从基本的热力学分析出发并结合质量平衡、焓平衡和熵平衡方程,该文提出一个以氢气......