A.calls
B.lines
C.talks
D.devices
[单选题]Themillionsofcalculationsinvolved,hadtheybeendonebyhand,__________allpracticalvaluebythetimetheywerefinished.A)hadlostB)wouldhavelostC)wouldloseD)shouldhavelost
[单选题]With hundreds of millions of electronic(71)taking place daily, businesses and organizations have a strong incentive to protect the(72)of the data exchanged in this manner, and to positively ensure the(73)of those involved in the transactions. This ha
[单选题]With hundreds of millions of electronic transactions taking place daily, businesses and organizations have a strong incentive to protect the(66)of the data exchanged in this manner, and to positively ensure the identities of those involved in the(67)
[单选题,共用题干题] With hundreds of millions of electronic (11)taking place daily, businesses and organizations have a strong incentive to protect the. (12) of the data exchanged in this manner, and to positively ensure the (13) of those involved in the transact
[单选题]Millions of people are in danger of getting malaria because______.A. some countries have not started a campaign against mosquitoesB. new species of mosquitoes may survive today's spraysC. malaria was once thought to be a very old evil of the worldD.
[单选题]To maintain a telephone conversation over the Internet. The voice packets must arrive at their destination in ()A.a continuous streamB.a burst streamC.a delayed streamD.a burst mode
[单选题]Who is making the telephone call?A.Thomas Brothers.B.Mike landon.C.Jack Cooper.
[单选题]B.This is a song millions of Americans will hear this New Year’s Eve. It is called Auld Lang Syne (《友谊地久天长》). It is the traditional music played during the New Year’s celebration. Auld Lang Syne is an old Scottish poem. It tells about the need to rem
[单选题]Passage FourMillions of stars are traveling about in space. A few form. groups which journey together, but most of them travel alone. And they travel through a universe so large that one star seldom comes near to another.We believe, however, that som
[主观题]to millions of amateur computer users, including color text and pages,