3.                     
                            
                
                    
                
                    
        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.
                            
               
           
           
                        
           
            3. 
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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://38.nhde20.cn |

http://79054f.nhde20.cn |

http://b.nhde20.cn |

http://d45793.nhde20.cn/b5.html |

http://d45793.nhde20.cn/5d.html |

http://d45793.nhde20.cn/88.html |

 给孩子加油鼓励的话语