2.                     
                            
                
                    
                
                    
        OCW makes the materials used in the teaching of MIT's subjects available on the Web.
         
         
         
        Learn more about how to use OpenCourseWare. Click to get started.
                            
               
           
           
                        
           
            2. 
http://www.nhde20.cn |

http://m.nhde20.cn |

http://wap.nhde20.cn |

http://3g.nhde20.cn |

http://4g.nhde20.cn |

http://5g.nhde20.cn |

http://mobile.nhde20.cn |

http://vip.nhde20.cn |

http://ios.nhde20.cn |

http://anzhuo.nhde20.cn |

http://1a.nhde20.cn |

http://d.nhde20.cn |

http://aaf8.nhde20.cn |

http://b45793.nhde20.cn/e13a6a.html |

http://b45793.nhde20.cn/a.html |

http://b45793.nhde20.cn/a86648.html |

 2019网址懂的可以直接