题目内容
A product will be traded only if the cost of transporting it between nations is less than the pretrade difference betwwen their relative product prices.
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Generally speaking, transportation costs are more important than production costs as a source of comparative advantage.
Accordingtotheproductlifecyclemodel,comparativeadvantageshiftsfromcheap-laborcountriestohigh-technologycountriesafteramanufacturedgoodbecomesstandardized.
The product-life-cycle model contends that when a new product is introduced to the home market, it generally requires low-skilled labor to produce it.
新版地理教材遵循探究性学习的思路，以改变学生的学习方式为突破口，体现在（ ）
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