单词：vertex of conic
锥线顶点
单词：vertex of conic 相关文章
图 graph 子图 subgraph 有向图 digraph(directed graph) 无向图 undigraph(undirected graph) 完全图 complete graph 连通图 connected graph 非连通图 unconnected graph 强连通图 strongly
发表于:2019-02-01 / 阅读(200) / 评论(0)
实用英语
实用英语
One of South Korea's most powerful business leaders has avoided a prison sentence for alleged corruption. A South Korean court agrees the former chairman of Samsung evaded taxes, but it threw out more serious charges. VOA's Kurt Achin reports from S
发表于:2019-02-02 / 阅读(177) / 评论(0)
VOA标准英语2008年（七月）
VOA标准英语2008年（七月）