【資料名稱】：通信英語試題

【資料作者】：未知

【資料日期】：未知

【資料語言】：中文

【資料格式】：DOC

【資料目錄和簡介】：

通信英語強化訓練試題（一）
Ⅰ 單項選擇題：(Choose the best one)

( )1.Furthermore, we shall prove that a minimum theoretical sampling frequency of order 6. 8 kHz is required _________a voice channel _________the range 300Hz to 3. 4 kHz.
A. convey, occupyB. to convey, occupying
C. conveying, occupied D. convey, to occupy
( )2.For example, the signal _________from a satellite, _________in far outer space, is very weak.
A. received, locatedB. receive, locate
C. receiving, locatingD. to receive, to locate
( )3.If we consider binary transmission, the complete information about a particular message will always _________by simply _________the presence or absence of the pulse.
A. obtain, detectB. be obtained, detecting
C. obtained, detectedD. obtaining, detected
( )4.4. There is an inherent advantage for _________noisy environments by _________digital transmission.
A. overcoming, choose B. overcome, choosing
C. overcome, chooseD. overcoming, choosing
( )5.Each voice channel has a separate coder，the unit _________converts sampled amplitude values to a set of pulses; And decoder, the unit _________performs the reverse operation.
A. who, whoB. when, when
C. where, whereD. that, that
( )6.The problem is easily overcome by _________a frame format, where at the start of each frame a unique sequence of pulses is placed _________the start of the frame.
A. specify, identifyB. specifying, so as to identify
C. specified, identifiedD. specify, identifying