【題目】讀我國主要山脈分布圖及地形剖面圖,回答問題。

(1)由剖面圖可以看出,我國地勢特征是____________,呈三級階梯狀分布。

(2)字母A、B所示山脈是我國地勢第二、第三級階梯的分界線。其中,山脈A大致的走向是________________;山脈B的名稱是________________。

(3)圖中山脈C和淮河組成了我國重要的地理分界線,山脈C的名稱是________。請列舉該分界線的兩項重要地理意義 。

【答案】(1)西高東低

(2)東北---西南;

(3)800毫米等降水量線;一月0°C等溫線

【解析】(1)由剖面圖可以看出,我國地勢特征是西高東低,呈三級階梯狀分布。

(2)由圖可知,山脈A大致的走向是東北-西南走向,山脈B的名稱是太行山。

(3)圖中山脈C和淮河組成了我國重要的地理分界線,山脈C的名稱是秦嶺,該分界線大致與我國800毫米等降水量線和一月0°C等溫線一致。

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