通井机用毛头起重的负荷不得超过（）kN。

A、10

B、15

C、20

D、25

翻译短语。

1．首次马拉松滑冰                                                        

2．为慈善机构捐款                                                        

3．第一双滑冰鞋                                                          _

4．进行了五个小时                                                        

5．整整五个小时                                                          _

6．从第一个开始                                                          _

7．自从9点                                                              ____

8．开始上课                                                              ___