A．ccording to Shannon's equation, what is the channel capacity of an analog voice-grade phone line with a bandwidth of 3100 Hz and a signal-to-noise ratio or 30 dB?

A．9.1 Kbps

B．9.3 Kbps

C．30.9 Kbps

D．30.17 Kbps

[单选题]A．ccording to Paragraph 4, what’s Jovce’s opinion about life in 1900? [ ]A． There were fewer problems for the familyB． Life was simpler but worse than it is nowC． There were things she liked and dislikedD． The family had more time to stay together

[单选题]A．ccording to Paragraph 4, what’s Jovce’s opinion about life in 1900?A． There were fewer problems for the familyB． Life was simpler but worse than it is nowC． There were things she liked and dislikedD． The family had more time to stay together

[单选题]What's the time?---It's ______.A.four fourtyB.four fortyC.forty fourD.fourt

[单选题]A．ccording to the author ,a politician's morality[A] is no match for his political ambition.[B] has been undervalued by Machiavelli and his likes.[C] is usually of secondary importance.[D] should be taken as a yardstick of his capability

[单选题]24． What's that? It's a________，A． basketballB． bookC． notebookD． desk

[单选题]－What's this in English?- _________。A.It's a map.B.That is a map.C.Yes, it'

[单选题]10． —What's the time?—It's _________five．A． atB． toC． aboutD． past

[单选题]What's the author's attitude toward Washington's two-term Presidency?A． He thinks Washington made a mistake by doing so.B． He thinks that Washington had a good personal reason for doing so.C． He thinks that Washington was too selfish in doing so.D

[单选题]A．ccording to the NAS/'s report, one of the problems in end-of-life care isA． prolonged medical procedures.B． inadequate treatment of pain.C． systematic drug abuse.D． insufficient hospital care.

[单选题]7． —What's the time now?—It' s________．A． ten o'clockB． ThursdayC． June 15thD． morning