的关键在于前者有开采成本低的煤资源,其水运成本也低。经济发达的中国南方没有煤,北方有煤但运输成本高昂,抵消了煤作为大宗商品的战略价值。
的关键在于前者有开采成本低的煤资源,其水运成本也低。经济发达的中国南方没有煤,北方有煤但运输成本高昂,抵消了煤作为大宗商品的战略价值。
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