为了帮助考生系统的复习2012年自考英语考试课程全面的了解自考英语考试教材的相关重点，小编特编辑汇总了2012年自考英语考试辅导资料，希望对您参加本次考试有所帮助！
7.将下面的短语译成汉语
Nuclear power is obtained from the energy which can be released from the uncleus of an atom.Until the twentieth century man used water,wood and the fossil fuels (coal,oil and gas)as sources of power,During the first quarter of the twentieth century physicists investigated the structure of the atom.
In 1919 Rutherford split the atom artificially.Thirteen years later the neutron was discovered.In 1939 Hahn and Strass-man investigated the action of neutrons on uranium 235.They found that it was split into two equal pieces.This process is known as fission.It released in fossion produce fissions in other atoms.This is known as a chain reaction.On 2nd December 1942 EnricoFermi and his colleagues produced the first controlled nuclear chain reaciton.
Since then atomic energy has been used in war and peace.In 1951 electricity was first produced by using the heat reom a nuclear reactor.More and more countries are building nuclear power stations to produce electricity.
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