Yijun Terrace has natural terrain characteristics, its known as the( )? A: "Living fossils" on the Loess Plateau B: Historical memory of the Loess Plateau C: A representative work of farming civilization D: The artistic pinnacle of farming civilization

The primary cause of these disasters is just that the river picked up a large amount of silt when flowing through the Loess Plateau in its middle __________________.

The river flows quietly in its upper reaches, however, in its middle reaches it splits the Loess ___________in half. Therefore, it carries a large amount of silt into the lower reaches.

‌The Yellow River originates from Zaqu at the southern foot of Chahasila Mountain, a branch of the Bayan Hara Mountains on the _____ Plateau.‍ A: Qinghai-Tibet B: Yunnan-Guizhou C: Loess D: Pamir

‏Why is the Yellow River “yellow”?‏ A: Because the river suffers from soil erosion. B: Because the color yellow is the royal color. C: Because the first Emperor named it “Yellow River”. D: Because the river was named after the Loess Plateau.

【单选题】哪种图形显示方法常用于确定两个量化的变量之间看上去是否有联系、模式或者趋势? () A. 直方图 B. 分位数图 C. 散布图 D. LOESS曲线

Which of the following best describes the formation of “desert pavement”? A: alluvial fans are eroded to form inselbergs with flat, angular rocky surfaces B: runoff and deflation carry off the fine particles of silt and clay, leaving coarser particles behind C: groundwater in an alluvial fan evaporates, leaving behind a surface layer of hard-baked mud and boulders D: deflation removes the coarse fragments leaving behind a layer of fine sediment (loess and mud)