Last Sunday morning when I got up, to me great surprise,  1.___________

I found that we had a big snowfall. I was very excited because      2.___________

it was a long time that I had ever seen such a heavy snowfall.       3.___________

So I decided to call my friends to go out to play snow together.     4.___________

We made up some snowmen and rolled some snowballs             5.___________

and we enjoyed the fun of playing fighting games. Just then             6.___________

we noticed that the buses and cars move very slowly              7.___________

because the heavy snow. So we went to clean the snow so as to     8.___________

help the traffic go safely. After the all morning’s hard work,             9.___________

we cleaned the snows on the road, and we went home happily.     10.___________

下列要求中，（）是分析施工进度计划工作之间的逻辑关系时，应当考虑的。

A.施工工艺的要求

B.施工方法和施工机械的要求

C.当地的气候条件

D.施工人员年龄的要求

E.安全技术的要求