（） is to get the materials and services from a company.

[单选题]Which of the following materials is a good insulator?( )A．SteelB．AluminumC．GlassD．Copper

[试题]The new music was built out of materials already in______. (exist)：blues，rock'n'roll，folk music.

[单选题]In the（ ），businesses offer services for which they charge a fee that is based on the number of size of transactions they process.Some of these services lend thenselves well to operating on the Web.A．Fee-for-Transaction Revenue ModelB．Advertising-Supp

[单选题]The high-speed data services for the interconnection of computer networks are usually referred to as ______ connections．A．LANsB．MANsC．WANsD．ATM

[单选题]The chefs in thisrestaurant [insist on] high standards of materials.A.depen

[单选题]Industrial countries( )a great amount of raw materials.A.consumeB.absorbC.a

[单选题]The network layer provides services to the transport layer．It call be based on either virtual circuits or datagrams．In both cases，its main job is（ ）packets from the source to the destination． A．dealing with B．sending C．routing D．receiving

[单选题]The consumer price index for services is classified as a:A.Lagging indicato

[单选题]Forwarding agent services are valuable in foreign trade because of the complicated（）that have to be made.A . arrangementsB . formalitiesC . proceduresD . process

[单选题]Repair of vital machinery and services on a ship should be accomplished（）.A . after control of fire，flooding，and structural repairsB . immediatelyC . after control of fire，but before control of floodingD . after stability is restored