Make sentences. 单词大排队，看谁站得对！

1.

                                                                                                                                     .

2.

                                                                                                                                       .

3. 

                                                                                                                                          .

4. 

                                                                                                                                         .

5.

                                                                                                                                         .

Pentium微处理器工作在实地址模式使用A19-A0的20根地址线，该处理器支持的最大物理地址空间为【 】。