题目内容：
根据下列文章,请回答题。DVD for Rent1 A pay-for-play system for video DVD will emerge by summer as an alternative, and possibly a competitor, to the DVD format currently available.2 The new system, called Digital Video Express (Divx), operates like a DVD player, except for the specially coded discs. These will cost $5 for initial viewing over a 48-hour period and can be viewed again for additional fees and even purchased for unlimited viewing.
3 Divx combines the service of a video rental (出租的) store with the operation of a pay-per-view TV channel. Unlike a rented videotape, though, the Divx disc needn't be returned. Customers can retain the disc for replay in the future at an additional fee, or simply throw it away.
4 Subsequent plays, or the purchase of unlimited-viewing rights, are billed to the customer's Divx account and charged to a credit card. The player's built-in memory keeps track of all Divx plays, and sends this information by toll-free phone modem (调制解调器) to the Divx record-keeping centre. Each Divx disc and player has a unique identification code, so the system knows which discs have been played and where.
5 Some Divx discs could be converted for unlimited play at a price likely to be lower than buying a conventional DVD. Others, called Divx Gold, would be sold from the beginning for unlimited play without further charge. Although conventional DVDs will run in a Divx player, conventional DVD players will lack the decoding (解码) and communications ability to play Divx discs. Divx players will be offered by Panasonic, RCA,and Zenith.
6 About 100 discs will be available initially from Disney, Dreamworks, Paramount, arid Universal, growing to 500 titles within a year. Other film makers have yet to adopt the Divx system, which is owned by retailer Circuit City, the 350-store electronics chain that bankrolled (提供资金)its development.Paragraph 2 A．Booming Business of Circuit City
B．Superior Quality of Conventional DVD Discs
C．The New System Called Divx
D．Unlimited Play of Divx Discs
E．Disc-play Tracking and Billing Systems
F．Two Functions Combined
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