单项选择题产品生命周期是指产品从新用到旧，直至报废的整个过程。 A、正确 B、错误
单项选择题What' s the record of money that customers spend in the department on one day?A.30, 000 pounds.B.300, 000 pounds.C.9 million pounds.D.1.5 million pounds.
