00471nam a22001575  45000010006000000050017000060080041000230200018000640500015000821000020000972450063001172600048001803000019002284400048002476500018002952644520230531230736.0120911s2011    ch            00010 chi    a978730011125400aP90b.G9760 aGuo, Qing Guang10aChuan bo xue jiao cheng( di2 ban)/cQing Guang Guoh[book]0 aBeijing :bzhong guo ren min da xue,c2011.  a275 p. :bill. 0ashi ji xin wen chuan bo xue xi lie jiao cai 4aCommunication