问题 问答题 简答题

等高线的基本特征有哪些?

答案

参考答案:

(1)同线等高:同一等高线上的各点,高度相等。

(2)等高距全图一致:等高距即指两条相邻等高线之间的高度差。

(3)等高线均为闭合曲线。

(4)等高线一般不相交、不重叠;有时也看到重合,那只有在峭壁处出现。

(5)等高线疏密反映坡度缓陡:等高线愈稀,则坡度愈缓;等高线愈密,则坡度愈陡。

(6)等高线与山脊或山谷线垂直相交。

单项选择题
改错题

对标有题号的每一行做出判断:每行只有一处错,按下列情况改正:该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,也用斜线划掉。该行缺一个词:在缺词处加一个漏字符号(),在该行右边横线上写出该加的词。该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

Dear Casey,

You asked in your last letter about my spare                               

time activities. Well, I like much more than one,                                 76._____________

such as painting and model making, so my favourite                           77._____________

is dancing. I started when I was eight year old,                                78._____________

and it is a great fun! Dancing is not difficult. If                                79._____________

you want to do it good, you need to find a good                              80._____________

dancing teacher and taking lessons regularly.                                      81._____________

That’s I did and I also had to take exams every                                    82.______________

six months. Now, I had stopped going to lessons.                                83.______________

But I sometimes take part performances at the                                    84.______________

school, that I really enjoy very much.                                                85.______________