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...2015-09-29
代詞(一)代詞的分類:英語中代詞分為:人稱代詞、物主代詞、反身代詞、指示代詞、關系代詞、疑問代詞、連接代詞和不定代詞等等。(二)人稱代詞:人稱代詞代替人和事物的名稱,分為主格和賓格兩種形式。1.主格用來作句子的主語、表語。如: I often go shopping on Sundays.(星期天我...2015-09-29
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 ...2015-09-29
Benefits of Educating GirlThe benefits of educating girls are numerous — to individual girls both when they are young and when they become adult women...2015-09-29
The Effects of Global Warming on WeatherThere are hidden factors which scientists call "feedback mechanisms”。 No one knows quite how they will interac...2015-09-29
Can Buildings Be Designed to Resist Terrorist Attack?In the aftermath of the terrorist attack on the World Trade Center, structural engineers are try...2015-09-29
Studies Show US Spending Doesn’t Get Best HealthThe United States many spend twice as much on health care as other rich countries1, but it is not gett...2015-09-29
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 ...2015-09-29
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...2015-09-29
Gross National HappinessIn the last century, new technology improved the lives of many people in many countries. However, one country resisted these c...2015-09-29
Physical FitnessPhysical fitness is today’s hot topic. And wherever you turn, you hear something new. But is it all true?The more you sweat, the more ...2015-09-29
Eiffel Is an EyefulSome 300 meters up,near the Eiffel Tower's wind-whipped summit the world comes to scribble.Japanese,Brazilians.Americans-they graf...2015-09-29