Generally speaking, transportation costs are more important than production costs as a source of comparative advantage.
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Accordingtotheproductlifecyclemodel,comparativeadvantageshiftsfromcheap-laborcountriestohigh-technologycountriesafteramanufacturedgoodbecomesstandardized.
A. 对
B. 错
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.
A. 对
B. 错
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( )
A. 设计各类问题
B. 重点阐述原理
C. 突出案例分析
D. 重视动手实验
地理教材的表述系统包括___________、___________、___________三个部分;深层系统由___________、___________和___________三部分组成。