Motoring Technology1.2 million road deaths worldwide occur each year,plus a further 50 million injuries.To reduce car crash rate,much research now is ...
代词(一)代词的分类：英语中代词分为：人称代词、物主代词、反身代词、指示代词、关系代词、疑问代词、连接代词和不定代词等等。(二)人称代词：人称代词代替人和事物的名称,分为主格和宾格两种形式。1.主格用来作句子的主语、表语。如： I often go shopping on Sundays.(星期天我...
The Effects of Global Warming on WeatherThere are hidden factors which scientists call "feedback mechanisms”。 No one knows quite how they will interac...
Operation MigrationIf you look up at the sky in the early fall in the northern part of North America, you may see groups of birds. These birds are fly...
Gross National HappinessIn the last century, new technology improved the lives of many people in many countries. However, one country resisted these c...
答案在下一页One Good Reason to Let Smallpox LiveIt's now a fair bet that we will never see the total extinction of the smallpox virus.The idea was to cap t...
and so on等等all at once突然;同时，一起once(and)for all一劳永逸，限此一次by oneself独自地，单独地other than不同于all right好，行ever since从那时起，自那时以来ever so非常，极其so…as to结果是;如此……以至于at...
Investment and ConsumptionInvestment in the public sector,such as electricity,irrigation,public services and transport (excluding vehicles,ships and p...
From Ponzi to MadofThe year was 1920. The country was the United States of America. The man's name was Charles Ponzi. Ponzi told people to stop depos...
Are You Just Not Ill or Excellent in Health?As we have seen, the focus of medical care in our society has been shifting from curing disease to prevent...
come/go into effect生效，实施catch one eye引人注目make a face做鬼脸catch fire着火make friends交朋友，友好相处make fun of取笑，嘲弄lose heart丧失勇气，失去信心get hold of抓住，掌握throw/cast l...
go before居前have to/have got t0不得不，必须help oneself自取所需(食物)keep out of躲开，置身…之外get out of逃避，改掉have get有give oneself up自首，投降，投案go along with陪同前往，随行g0 in fo...
Most Adults in US Have Low Risk of Heart DiseaseMore than 80 percent of US adults have a less than 10–percent risk of developing heart disease in the ...
Better Control of TB Seen If a Faster Cure Is FoundThe World Health Organization1 estimates that about one-third of all people are infected with bacte...
be able to(do)能(做)，会(做)be absent from缺勤，缺课be accustomed to习惯于be active in积极于be alive to发觉，感觉，对…敏感be angry with对……发怒be anxious for急切盼望，渴望be about to(do...
名词或代词作主语时和谓语之间的单复数的一致问题：1.谓语和谓语基本保持单复数的一致,即：主语是可数名词单数或不可数名词时,谓语动词用单数形式：如：The computer was a great invention.(计算机是个了不起的发明)The water in the glass is ver...
动词不定式可以在句子中用作状语，有下列几种情况：[A] 放在不及物动词(come,go,stop,finish,wait等词)的后面。如：He came to see her yesterday.(他昨天来看望她)(表示来的目的)/ I stopped to have a rest.(我停下来休息一...
Lead PollutionLead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions ori...