按要求写句子。     
1．沉迷于网络游戏会导致视力严重下降。     
改为疑问句：                                                                                
改为双重否定句：                                                                          
2．桑恩传过来紧急救援中心的电话号码。   
改为“被”字句：                                                                                      
改为“把”字句：                                                                                      
3．我上网查到许多学习资料。   
改为设问句：                                                                                              
改为反问句：