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【单选题】
对心传导系统的错误说法是( )A.
窦房结位于上腔静脉口与右心耳之间的心内膜深面
B.
房室结于房间膈下部右侧心内膜深面
C.
窦房结与房室结间有前、中、后结间束相连
D.
房室希氏房室结发出
E.
左、右最后形成浦肯野纤维网
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反馈参考答案：
举一反三
【单选题】The HO model assumes that ________ are identical between countries.
A.
tastes
B.
technology sets
C.
factor endowments
D.
Both A and B
【单选题】In the HO model, the production possibility frontier is bowed out due to the assumption of
A.
identical tastes.
B.
different factor intensities in the production of the two goods.
C.
increasing returns to scale.
D.
Two of the above.
【简答题】Study the model and rewrite the following sentences by using "no matter who/ what/which/when/how/where" structure.
【单选题】The assumption of increasing opportunity costs in the HO model increases the likelihood that
A.
there will be incomplete specialization in production after trade begins.
B.
countries will be better off with free international trade.
C.
countries will maximize their standards of living from free international trade.
D.
All of the above.
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