题目内容

同轴电缆与双绞线相比,同轴电缆的抗干扰能力弱

A. 对
B. 错

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ADSL的下行速度可以达到100Mbps.

A. 对
B. 错

物理层主要解决哪些问题,物理层的主要特点是什么?

A tax on an imported good is called a

A. quota.
B. tariff.
C. supply tax.
D. trade tax.

Assume, for China, that the domestic price of apples without international trade is higher than the world price of apples. This suggests that, in the production of apples,

A. China has a comparative advantage over other countries and China will import apples.
B. China has a comparative advantage over other countries and China will export apples.
C. other countries have a comparative advantage over China and China will import apples.
D. other countries have a comparative advantage over China and China will export apples.

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