问题
问答题 简答题
简述等高线的特点及其分类？
答案
参考答案：等高线具备以下基本特点：
1、位于同一条等高线上的各点高程相等。
2、等高线是封闭连续的曲线。
3、等高线图形与实地保持几何相似关系。
4、在等高距相同的情况下，等高线愈密，坡度愈陡，等高线愈稀，坡度愈缓。等高线分首曲线、计曲线、间曲线和助曲线四种。
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简述等高线的特点及其分类？
参考答案：等高线具备以下基本特点：
1、位于同一条等高线上的各点高程相等。
2、等高线是封闭连续的曲线。
3、等高线图形与实地保持几何相似关系。
4、在等高距相同的情况下，等高线愈密，坡度愈陡，等高线愈稀，坡度愈缓。等高线分首曲线、计曲线、间曲线和助曲线四种。
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| My pen friend is a kind and friendly girl. She is in England. Her _1_ is Connie. I meet Connie _2_ the Internet, and we are both twelve years _3_ . First, I _4_ a letter to her and introduce my hobbies, my school and my daily life. A few days later, I receive Connie's _5_ . She _6_ me a lot about herself. I learn that she loves languages, sports and movies. She likes China and Chinese food very much. She tells me something about England, too. Connie is good at English, French(法语)and Spanish(西班牙语), so I ask her to _7_ me a little of them. Connie wants to learn some _8_ , but it's very difficult for her. Through Connie, I know _9_ about the world outside. I would like to 10_ Connie some day in England.
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