基础写作

         After three years' staying together, you will say goodbye to your teachers soon. You must have much to say to your teachers.

       ·What you want to say to your English teacher most

       ·Why you want to say so

       ·What you want to tell her about your future planDear

Mrs Guo,

                                                                                                                                           Yours．

                                                                                                                                           Zhang Xu

( )荷载是指在设计基准期内，其值不随时间变化。

A．标准
B．正常
C．单位
D．永久(恒)