摘 要: | 自然环境Natural Environment Geographical Location: Its location is between the east longitude of 113°40′~116°20′and the north latitude of 38°10′~40°.It is bounded by Shanxi Province in the west,adjacent to Beijing and Zhangji- akou City in the north,adjacent to the City of Langfang and Cangzhou in the east,and contiguous to the City of Shi-
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