坎儿井的水源来自哪里
坎儿井的水源来自哪里
语文人气：490 ℃时间：2020-01-26 04:59:17
优质解答
构造原理编辑坎儿井是一种结构巧妙的特殊灌溉系统,它由竖井、暗渠、明渠和涝坝四部分组成.总的说来,坎儿井 坎儿井的构造原理是：在高山雪水潜流处,寻其水源,在一定间隔打一深浅不等的竖井,然后再依地势高下在井底修...
我来回答
类似推荐
猜你喜欢
- 1英语翻译
- 2用一块长是10厘米，宽是8厘米的长方形厚纸板，剪出一个最大的正方形，这个正方形的面积是（ ）平方厘米. A.80 B.40 C.64
- 3She isn't t__ enough to reach the apples on the tree
- 4我要一篇英语的课前演讲,一分钟左右的,可以是幽默短文
- 5根号X等于多少?根号X分之一等于多少?
- 6关于IF虚拟语气以及IF虚拟语气的倒装（在线等）
- 7计算：2008×2010-20092．
- 8(1) It's silly to go to the _____(费) of buying new clothes when you don't really need them.
- 9不定代词 how much milk is there is the bottle?_______. _________ of them likes football.____ of
- 10A bird is known by its note,and a man by his talk 翻译哦