听力原文: This is Margaret from General Public Services. I got your number from one of your customers, City Chiropractic. I would like to place an order for a water dispenser service. We would like to rent a large size, electric water cooler with weekly bottle water refills. We are located at 1254 S. Park Street, Suite 321. Please send all correspondence and bills in care of Letta Parks, our accountant. We would like services to start from June 1st. If you have any questions, please give us a call at 844-7789.
Who is making the phone call?
A.The chiropractic office.
B.The accountant.
C.The manager.
D.A new customer.
第2题
各单个偏差绝对值的平均值()
A.相对偏差
B.平均偏差
C.相对平均偏差
D.标准偏差
E.相对标准偏差
第3题
绝对偏差与平均值之比为()
A.相对偏差
B.平均偏差
C.相对平均偏差
D.标准偏差
E.相对标准偏差
第4题
平均偏差与平均值之比为()
A.相对偏差
B.平均偏差
C.相对平均偏差
D.标准偏差
E.相对标准偏差
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