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剑桥雅思真题阅读核心同义替换

1.题干：The only hope was to tell the probe to replace them with…-but

distance made communication with the probe difficult.

原文：The solution was to get a message to Voyager I to instruct it to use spares to change the failing parts.With the probe 12 billion kilometres from Earth,this was not an easy task.

同义替换：

The only hope---the solution

To tell the probe---to get a message to Voyager I

Replace…with…---use…to change

Distance---12 billion kilometres

Difficult---not an easy task

2.题干：A…was used to transmit the message at the speed of light.

原文：By means of a radio dish belonging to NASA’s Deep Space Network,the message was sent out into the depths of space.Even travelling at the speed of light,it took over 11 hours to reach its target,far beyond the orbit of Pluto.

同义替换：

A…was used---by means of a…

To transmit the message---the message was sent out

At the speed of light---travelling at the speed of light

3.题干：The message was picked up by the probe and the switchover took place.

原文：Yet,incredibly,the little probe managed to hear the faint call from its home planet,and successfully made the switchover.

同义替换：

Was picked up---hear the faint call

Took place---successfully made

4.题干：The concept of describing something as true or false was the starting

point for Shannon in his attempts to send messages over distances.

原文：The most basic form of information,Shannon argued,is whether something is true or false-which can be captured in the binary unit,or‘bit’,of the form 1 or 0.Having identified this fundamental unit,Shannon set about defining otherwise vague ideas about information and how to transmit it from place to place.

同义替换：

Describing---having identified

The starting point---the most basic form

Something as true or false---something is true or false

Send messages over distances---transmit it from place to place

5.题干：The amount of information that can be sent in a given time period is

determined with reference to the signal strength and noise level.

原文：This rate depends on the relative strengths of the signal and noise travelling down the communication channel,and on its capacity(its‘bandwidth’).

同义替换：

Is determined with reference to---depends on

The signal strength and noise level---the relative strengths of the signal and noise

Be sent---travelling down

6.题干：Products have now been developed which can convey more

Information than Shannon had anticipated as possible.

原文：As recently as 1993,engineers made a major breakthrough by discovering so-called turbo codes-which come very close to Shannon’s ultimate limit for the maximum rate that data can be transmitted reliably,and now play a key role in the mobile videophone revolution.

同义替换：

Products---the mobile videophone

Been developed---made a major breakthrough by discovering

Convey more information---come very close to Shannon’s ultimate limit for the maximum rate

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