The commodity terms of trade are found by dividing a country's import price index by its export price index.
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For the commodity terms of trade to improve, a country's export price index must rise relative to its import price index over a given time period.
A. 对
B. 错
For the commodity terms of trade to improve, a country's imiport price index must rise relative to its export price index over a given time period.
A. 对
B. 错
数控机床通过互联网直接和机床生产厂家互通信息,发现并消除故障是()
A. 在线诊断
B. 离线诊断
C. 远程诊断
D. 程序诊断
加工程序是数控机床自动加工零件的()
A. 输入介质
B. 存储载体
C. 加工指令
D. 操作系统