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【单选题】
经济学中所说的长期是指( )。A.
一年或一年以上的时期
B.
在这一时期内所有投入要素均是固定不变的
C.
在这一时期内所有投入要素均是可以变动的
D.
在这一时期内，生产者来不及调整全部生产要素的投入数量，至少有一种生产要素的投入数量是固定不变的
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【单选题】Pick the true statements from the following. I. Detrending removes the lag from oscillators. II. Smoothing removes the lag from oscillators. III. The MACD histogram is an example of double detrending....
A.
Only I and II are incorrect.
B.
Only I, III, and IV.
C.
All are correct.
D.
Only I and III are correct.
【单选题】When using the moving average method, you must select which represent(s) the number of terms in the moving average.
A.
a smoothing constant
B.
the explanatory variables
C.
an alpha value
D.
a span
【单选题】For example, you can handle conflict by denying that the problem exists, smoothing it over, or trying to overpower the other person. These, of course, will lead to win or lose situations. But when you...
A.
cooperating and compromising with the other party
B.
denying the conflict exists
C.
smoothing the conflict over
D.
trying to defeat the other party
【单选题】When using exponential smoothing, a smoothing constant must be used. The smoothing constant is a value that:
A.
ranges between 0 and 1
B.
ranges between –1 and +1
C.
is equal to the largest observed value in the series
D.
represents the strength of the association between the forecasted and observed values
【单选题】When is the exponential smoothing model equivalent to the naïve forecasting model?
A.
α = 0
B.
α = 0.5
C.
α = 1
D.
during the first period in which it is used
E.
never
【简答题】出院病员的病历首页是()。
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