公路上有一排电线杆，共25根，每相邻两根间的距离是45米，现在要

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问题填空题

公路上有一排电线杆，共25根，每相邻两根间的距离是45米，现在要改成60米，可以有（）根不需移动。

答案

问答题

Directions:

A. Study the following picture carefully and write an essay in no less than 160-200 words.

B. Your essay must be written clearly on ANSWER SHEET 2.

C. Your essay should meet the requirements below:

1) Describe the picture

2) interpret its meaning, and

3) give your comments.

问答题简答题

变电事故处理的原则是