【答案解析】[听力原文]
Credit Card
A credit card is a thin plastic card / that contains identification information such as a signature or picture, / and authorizes the person named on it to charge purchases or services to his account. / The first universal credit card was introduced by Diners Club. Inc., in 1950. / Another major universal card was established in 1958 by the American Express Company. / Later came the bank credit-card system. / Under this plan, the bank credits the account of the merchant / as sales slips are received and assembles charges to be billed to the cardholder at the end of the billing period.