西部为西西伯利亚平原,介于乌拉尔山脉和叶尼塞河之间,地势低平,沼泽宽广,平均海拔120米,主要河流有鄂毕河和叶尼塞河; 中部为中西伯利亚高原,西起叶尼塞河西北角的普托拉纳山,东达勒拿河流域,平均海拔300~500米,高原面破碎; 南部和东北部山地,包括切尔斯基山脉、上扬斯克山脉、贝加尔诸山、东西萨彦岭、阿尔泰山(西北段)等。 西伯利亚地处中高纬度,气候寒冷,北半球的两大“寒极”(上扬斯克和奥伊米亚康)均位于此。大陆性气候显著,自西向东逐渐增强,冬季寒冷漫长,夏季温和短暂。年均气温低于0℃。东北部雅库特地区的绝对低温是-70℃。 降水时空差异明显 ,北冰洋沿岸年降水量100~250毫米,针叶林地带500~600毫米 ,阿尔泰山地达1000~2000毫米 。75%~80%的降水主要集中在夏季。植被有苔原、森林沼泽、泰加针叶林、森林草原和无树草原等。自北向南有苔原、森林苔原、森林、森林草原和草原带。河流多流入北冰洋,大河有鄂毕河、叶尼塞河及勒拿河等。
初二英语上册水平,关于暑假旅行的作文
This summer holiday I have been to BeiJing for a travel. it was a great journey! we have went to see the Imperial Palace and the great wall and them let me feel that I was proud to be a Chinese.
The Imperial Palace noted the history. there were many antiques which we could espy the great culture .
From the great wall,it was a well-known wonder in the world.it is made of big stones which was too heavy to bring even uesing it to buil a construction of ruggedization. what a great grandeur!