【简答题】______ refers to the average level of the export commodity within a certain period of time.
【单选题】The interval of the average elapsed time from the meridian transit of the moon until the next high tide is called the ().
B.
establishment of the port
【单选题】(For) married mothers, the time (spend) on child care (increased) to (an average) of 12.9 hours a week in 2009.
【简答题】He is finally determined to quit smoking for he knows that it may_________ hishealth. A) ensure B) persecute C) jeopardize D) assure
【单选题】The average time when the goods is moved in and out of warehouse is ( ).
【单选题】Dad agreed to the afternoon lesson because that was the time whe (. ).
A.
He was at home so that he could know how Susie was doing
B.
He had fewer clients so that Susie's piano lesson would bother them the least
C.
He was free and could enjoy listening to Susie playing the piano
D.
He was good-tempered and could endure Susie's practicing
【单选题】A prediction method that uses the average number of time series over time (逐期) as a prediction value is called .
C.
Exponential smoothing method
D.
mathematical model method