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【題目】讀圖,思考回答。

(1)秦嶺——淮河一線油菜開花日期是________(月、日)左右。

(2)由圖可以判定我國東部油菜花開花日期的規(guī)律是什么?

(3)形成上述規(guī)律的原因是什么?

【答案】(1)4月1日

(2)從南向北花期越來越晚。

(3)受緯度因素的影響。

【解析】(1)讀圖可知:秦嶺——淮河一線油菜開花日期是4月1日左右。

(2)緯度位置是影響氣候的基本因素,一般是緯度越低,氣溫越高;緯度越高,氣溫越低.讀圖可知:我國東部地區(qū)自南向北溫度越來越低,因此我國東部油菜開花期從南向北時間越來越晚。

(3)緯度位置是影響氣候的基本因素,一般是緯度越低,氣溫越高;緯度越高,氣溫越低.讀圖可知:我國東部地區(qū)自南向北溫度越來越低,因此我國東部油菜開花期越往北時間越晚。

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