2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Economy is one powerful motive for camping, since after the initial outlay upon equipment, or through hiringit,

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 There is no shortage of tipsters around offering ‘get-rich-quick’ opportunities. But if you are a serious priv

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 In man's early days, competition with other creatures must have been critical.But this phase of ourdevelopment i

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 A gifted American psychologist has said, 'Worry is a spasm of the emotion; the mind catches hold of somethingand

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 We must conclude from the work of those who have studied the origin of life, that given a planet onlyapproximate

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Custom has not been commonly regarded as a subject of any great moment. The inner workings of our ownbrains we f

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

Two main techniques have been used for training elephants, which we may call respectively the tough and thegentle. The

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

An earthquake comes like a thief in the night, without warning. It was necessary, therefore, to inventinstruments that

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 I have known very few writers, but those I have known, and whom I respected,confess at once that they have littl

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Waves are the children of the struggle between ocean and atmosphere, the ongoing signatures of infinity. Raysfro

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 At the age of twelve years, the human body is at its most vigorous. It has yet toreach its full size and strengt

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Contamination of water supplies is usually due to poor sanitation close to water sources, sewage disposalinto th

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 The Moon is likely to become the industrial hub of the Solar System, supplying the rocket fuels for its ships,ea

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 If a nation is essentially disunited, it is left to the government to hold it together.This increases the expens

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

Education is one of the key words of our time. A man without an education,many of us believe, is an unfortunate victim

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

Parents are often upset when their children praise the homes of their friends andregard it as a slur on their own cook

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Appreciation of sculpture depends upon the abi8lity to respond to form in threedimensions. That is perhaps why s

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

In his own lifetime Galileo was the centre of violent controversy; but the scientificdust has long since settled, and

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Many strange new means of transport have been developed in our century, thestrangest of them being perhaps the h

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

Our knowledge of the oceans a hundred years ago was confined to the two-dimensionalshape of the sea-surface and the ha

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 From the seventeenth-century empire of Sweden, the story of a galleon thatsank at the start of her maiden voyage

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 This is a sceptical age, but although our faith in many of the things in which ourforefathers fervently believed

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 Many people in industry and the Services, who have practical experience ofnoise, regard any investigation of thi

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 It is animals and plants which lived in or near water whose remains are mostlikely to be preserved, for one of t

2007-03-21 所属栏目:新概念英语听力mp3下载第四册

 No two sorts of birds practise quite the same sort of flight; the varieties are infinite,but two classes may be