A compound is the combination of only two words.

A only if ;

B if only ;

C even if

A.specific duties

B.advalorem duties

C.compound duties

D.alternative duties

A、lingered

B、stack

C、spiral

D、motivation

All VHF marine band radios operate in the simplex mode，which means that______．

A.only one person may talk at a time

B.only two persons may talk at the same time

C.the radio only transmits

D.the radio only receives

When most people refer to multimedia, they generally mean the combination of two or more continuous media, usually with some user(115). In practice, the two media are normally audio and video, this is,(116)plus moving(117).It should be' obvious by now that transmitting multimedia material in uncompressed form. is completely out of(118). The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission(119).

A．display

B．games

C．help

D．interaction

E．pictures

单句理解

听力原文：More common for lending transactions today is compound interest.

(1)

A．Lending covenants now are often made at compound interest.

B．Lending transactions now are often made at compound interest.

C．Lending decisions now are often made at compound interest.

D．Lending proposals now are often made at compound interest.

A. The backup as copy can only be taken to disk

B. The backup as copy can only be taken to tape

C. Backup can be performed only when the instance is shutdown

D. Backup will constitute all used and unused blocks in the database

A、just left

B、was just leaving

C、has just left

D、had just left

A.PPP

B.TCP/IP

C.TCP

D.POP3

E.PPPoE