【題目】回答下列各題：

（1）三江源頭自然保護區(qū)位于________省，三江是指________、________和________三條大河。

（2）西北地區(qū)自東向西依次出現(xiàn)森林草原、草原、荒漠草原和荒漠景觀，請判斷塔里木盆地屬于________景觀，造成這種差異的原因是什么? ________

（3）青藏地區(qū)農(nóng)作物主要分布在雅魯藏布江谷地和湟水谷地的最主要因素是 。

【答案】（1）青海；長江；黃河；瀾滄江（2）沙漠；自西向東受海洋暖濕氣流影響越來越小，降水逐漸減少（3）河谷地區(qū)海拔較低，氣溫較高，且有充足的水源

【解析】本題考查青藏地區(qū)與西北地區(qū)地理概況。（1）三江源頭自然保護區(qū)位于青海省，三江是指長江、黃河、瀾滄江三條大河。（2）西北地區(qū)自西向東受海洋暖濕氣流影響越來越小，降水逐漸減少，故自東向西依次出現(xiàn)森林草原、草原、荒漠草原和荒漠景觀，塔里木盆地位于新疆境內(nèi)，位于西北地區(qū)的最西部，故其主要為荒漠景觀。（3）青藏地區(qū)地勢高、氣溫低，該地區(qū)的河谷地區(qū)海拔較低、氣溫較高、且有充足的水源，是其主要農(nóng)業(yè)區(qū)。該地區(qū)的主要農(nóng)業(yè)區(qū)為在雅魯藏布江谷地和湟水谷地。

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