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【判断题】
对于两个变量数列,比较其平均值的代表性,用标准差就可以进行判断A.
正确
B.
错误
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反馈参考答案：
举一反三
【判断题】In a large wind farm where several hundred individual wind turbines distributed over an extended area, the land between the turbines cannot be used for any other purposes.
A.
正确
B.
错误
【简答题】受电弓专项检修中的绝缘检测是用（）V兆欧表测量受电弓框架和大地（EGS盘）之间阻值在（）以上。
【简答题】CRH2型动车组受电弓专项检修中的绝缘检测是用（）兆欧表测量受电弓框架和大地（EGS盘）之间阻值在（）以上
【单选题】GA wind farm in Iowa buys a large turbine generator from a Swedish-owned factory located in Connecticut that uses workers who live in Connecticut. As a result,
A.
U.S. investment, GDP, and GNP all increase by the same amount.
B.
U.S. investment increases, but GDP and GNP are unaffected by the purchase
C.
U.S. investment and GDP increase by the same amount, but U.S. GNP increases by a smaller amount.
D.
U.S. investment and GNP increase by the same amount, but U.S. GDP increases by a smaller amount.
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