问题 填空题

变压器效率最好时的负载率是()。

答案

参考答案:50%~60%

单项选择题 A1/A2型题
写作题

书面表达 。

假设你是李华,你遗失了你的英国籍好友Frank借给你的一本书,请根据以下提示用英语给他写一封道歉信.

1.怎么遗失的;

2.对该书的评价;

3.如何补救;

4.你的教训.

注意:1. 信的开头、落款及信的第一句已给出.

      2. 可适当增加细节.

Dear Frank,

     I am terribly sorry to tell you that                                                                                          

                                                                                                                                              

                                                                                                                                                

                                                                                                                                                             

                                                                           Yours truly,

                                                                            Li Hua