问题 问答题 简答题

UHF段的频率范围是多少?

答案

参考答案:

300到3000MHz(注意单位是兆赫MHz)

阅读理解与欣赏

阅读下面的诗歌,完成练习。     

                                                                    乡愁   

                                                           小时候   

                                                           乡愁是一枚小小的邮票   

                                                           我在这头   

                                                           母亲在那头   

                                                           长大后   

                                                           乡愁是一张窄窄的船票   

                                                           我在这头   

                                                           新娘在那头   

                                                           后来呵   

                                                           乡愁是一方矮矮的坟墓   

                                                           我在外头   

                                                           母亲在里头   

                                                           而现在   

                                                           乡愁是一湾浅浅的海峡   

                                                          我在这头  

                                                          大陆在那头

1.这首诗是按照                       顺序写的, 表达了诗人                          的思想感情。   

2.诗中,“一湾浅浅的海峡”是指                               海峡。   

3.诗人为什么把乡愁比喻成“邮票”、“船票”?

                                                                                    

4.诗人又为什么把乡愁比喻成“坟墓”、“海峡”?

                                                                                    

5.全诗你最喜欢的是                               这一句,因为                                             。

单项选择题