（）switching wasinvented in the late1960s for data communications.

[单选题]Circuit Switching is problematic because data communications is（6.1），that i

[单选题]Circuit Switching is problematic because data communications is（6.1），that i

[试题]() switching was invented in the late 1960s for data communications.A．Frame B．Link C．Packet D．Line

[单选题]B．etween the late 1950s and the late 1970s, infant mortality in northern Africa______.A．still remained highB．fell sharplyC．was lower than that in AsiaD．rose tremendously

[试题]H．ow does late arriving data affect dimensions and facts? Share techniques for handling each.迟到的数据对事实表和维度表有什么影响？怎样来处理这个问题？

[单选题]Passage OneIn the late 1860's, industry in America grew rapidly. More factories meant more jobs. But working conditions were dangerous. Employees were forced to work as many as 16 hours a day in hot, dirty rooms. Children often worked alongside adul

[单选题]You ______go home now. It's getting late.A． would ratherB． had ratherC． would betterD． had better

[名词解释] Switching交换

[单选题]Text 3In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association (NBA) listed at over seven feet. If he had played last season, however, he would have been one of 42. The bodies playing major professional

[单选题]A．) still lateB．) too lateC．) so lateD．) past