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【判断题】
China, has the comparative advantage in the production of textile products and thus will benefit its economy by exporting these goods or exchanging these goods for the products of other nations.A.
正确
B.
错误
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【多选题】WHICH TWO STATEMENTS DESCRIBE INTERMEDIARY DEVICES? (CHOOSE TWO.)
A.
Intermediary devices connect individual hosts to the network.
B.
Intermediary devices alter data content.
C.
Intermediary devices generate data content.
D.
Intermediary devices direct the path of the data.
E.
Intermediary devices initiate the encapsulation process.
【单选题】The intermediary’s profit is .
A.
the service fee paid by the customers
B.
the difference between its receipts and its costs
C.
its earnings from investments
D.
from the primary and secondary instruments
【单选题】在利用回归模型进行预测时，需要对回归系数、回归方程进行检验，以判定预测模型的合理性和适用性，其检验方法有( )等。
A.
系数分析、相关检验、t检验
B.
方差分析、系数分析、t检验
C.
方差分析、相关检验、t检验
D.
方差分析、相关检验、系数分析
【简答题】正常人过度通气后可出现呼吸暂停其主要原因是
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