第,一条;;It is given that the scale of a map is 1:250000.It the length of a railway line on the map is 121cm ,find its actual length in km 第二条;;the figure shows a scale drawing of a pyramid.(a)Express the scale in the fram 1 cm:n mm(B) If the height of the pyramid in the drawing is2.5cm,what is its actual hight?第三条;;The scale of a map is 1:20000.If the lrgth and the width of rectangular park on the map are 4.5cm and 2.8cm respectively,find the actual are
问题描述：
第,一条;;
It is given that the scale of a map is 1:250000.It the length of a railway line on the map is 121cm ,find its actual length in km
第二条;;
the figure shows a scale drawing of a pyramid.
(a)Express the scale in the fram 1 cm:n mm
(B) If the height of the pyramid in the drawing is2.5cm,
what is its actual hight?
第三条;;
The scale of a map is 1:20000.If the lrgth and the width of rectangular park on the map are 4.5cm and 2.8cm respectively,find the actual area of the park in km2.
答
1.给你一张地图,比例是1:250000.图上有一条铁路是121cm,问它的实际长度.
2.额,大概意思还是那个,应该算是规划图一类的吧,图的 比例是1 cm:n mm（?打错?、）,如果图上金字塔的高度是2.5cm,问它的实际高度
3.地图的缩放比例是1:20000.如果一个长方形的公园在图上的长和宽分别是4.5cm和2.8cm,求这个公园的面积（用平方千米表示）
其实这些题目你只要抓住主要单词就好了.没必要一个一个地都知道