图2是某区域地质地貌剖面图。读图2，回答4—6题。
图中高速公路遂道穿过
| A．向斜谷 | B．背斜谷 | C．向斜山 | D．背斜山 |
图中甲地多见石芽、溶洞等地形，推断未知岩层应为
| A．页岩 | B．板岩 | C．石灰岩 | D．花岗岩 |
若河流沿岸地区柑橘分布广泛，则图中乙地常见植被类型最有可能为
| A．常绿阔叶林 | B．落叶阔叶林 | C．针阔混交林 | D．针叶 |
相关试题
Premier Wen Jiabao said that if we worked hard and____ optimistic,we were_____ win the war against the finanical crisis.
| A．were; bounding | B．were; bound to | C．was; bounding to | D．had; bounded to |
Single-parent usually____ some of the functions that absent adult in the house would have served under the financial crisis.
| A．takes over | B．takes after | C．takes out | D．takes in |
He was unaware of the financial crisis involed, so his choice was quite_____.
| A．rational | B．arbitrary | C．mechanical | D．predictable |
图示意我国某地形区典型地段的地形剖面。读图，完成1-3题。
1.造成该地形区地表形态变化的主要外力及地质作用分别为（）
| A． | 流水、沉积作用 | B． | 流水、侵蚀作用 |
| C． | 风力、沉积作用 | D． | 风力、侵蚀作用 |
2.该地形区应重点防御的自然灾害是（）
| A． | 洪涝 | B． | 干旱 | C． | 低温冻害 | D． | 滑坡、泥石流 |
3.该地形区可能位于我国的（）
| A． | 黄河下游地区 | B． | 长江中游地区 | C． | 云贵高原 | D． | 珠江三角洲 |
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