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【单选题】
For two people who are planning to trade, it is impossible to
A.
have a comparative advantage in both goods.
B.
have an absolute advantage in both goods.
C.
specialize in the production of one good.
D.
trade so that both people will be better off.
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参考答案:
举一反三
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【单选题】一个主蓝牙设备最多可以同时和( )个从设备通信。
A.
5
B.
6
C.
7
D.
8
【判断题】在产品和劳务有很多相近的替代品时需求的价格弹性比较大。
A.
正确
B.
错误
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【单选题】John stayed in Italy for two months because he took enough money with him.
A.
B.
False
【判断题】在OSPF广播或者NBMA网络类型中,router priority大的设备不一定会成为DR
A.
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B.
错误
【简答题】材料力学研究的是工程构件( )、( )和( )的科学。
【判断题】材料力学研究的是杆件受力,杆件是一维物体,只能受简单力作用,比如拉、压、剪等。
A.
正确
B.
错误
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