The desert vegetation in Turkmenistan consists predominantly of semishrub sagebrush-halophyte and psammophyte communities, with dominant formations of Haloxyleta, Salsoleta, Calligoneta , and Artemiseta. We have separated plant communtites into 26 formations and 28 groups of associations with a ...
Irrespective of aridity, vegetation effectively stabilizes low curvature reaches and allows meanders to gain sinuosity as they migrate laterally, thereby leaving measurable imprints on the morphodynamics of meandering rivers. ResultsOur dataset consists of 54 single-thread meandering rivers found in distinct...
This rapid zone of transition is called the upper timberline or 2、tree line. In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.通常从山坡上的森林到没有树的苔原是一种非常戏剧化...
原文前句说low growth form使得植物能够利用积雪覆盖产生的隔绝效应大量生长，接着就说在赤道地区怎么样，赤道没有雪，也就没有隔绝效应，肯定low growth form就没那么多了，至少应该得到prevalent是多的意思
选项分析：trees是正确答案，此外，被暴露在大风之下的应该是树，山谷山脊和高度都不靠谱。
at the upper timberline.这些树不长的原因没有一个统一意见。比如snow,比如windvelocity比如ultraviolet light 比如temperature 主要还是温度 Above the tree line there is a zone that is generally called alpine tundra. Immediately adjacent to the timberline, the tundra consists of a fairly complete cover of...
In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture. The upper timberline, like the snow line, is highest in the tropics and lowest in the Polar Regions. It ranges from sea level...
题干分析：题目中的定位词是lower timberline，可以定位到段落的后部。同时注意到段落中的逻辑分割节点also。
，就是说正确插入点之前的句子必须是对待插入句意思上的一个解释、原因，插入
The crust consists mostly of microphytes such as cyanobacteria. The... A Karnieli,H Tsoar - 《International Journal of Remote Sensing》 被引量: 181发表: 1995年 Microbiotic crust control of runoff generation on sand dunes in the Negev Desert Runoff generation was measured within an arid dune...