共 4 条
[1]
[Anonymous], 2009, ONLINE J DISTANCE LE, V12
[2]
[Anonymous], 2008, J SHANGHAI PHYS ED I, V32, P68
[3]
Lin H., 2005, J U ELECT SCI TECHNO, V7, P88
[4]
Zuo-yong W., 2010, J QIQIHAR U PHILOS S, V2, P171