六级英语

Protecting Student Privacy in the Data AgeA. In Kentucky, parents, educators and policy makers can track how many students from a high school go to college, and once they are there, how many require r...

Can Your Still Work Your Way through College?A. The American Dream refers to the idea that a person has the opportunity to succeed and prosper, despite their economic or social backgrounds, through ha...

Apps Designed for Distracted DriversA. Marry Williams recalls the conversations he and his wife would have with their two daughters about the dangers of talking and texting while driving..“It’s al...

Getting Air Traffic under ControlA) The shortest distance between two points is a straight line---unless you happen.to be traveling in an airplane. Commercial airliners around the world follow circuit...

The Public Health Crisis Hiding in Our FoodA. If you have high blood pressure, you’re in good company. Hypertension (高血压) afflicts 67 million Americans, including nearly two-thirds of people o...

Scholars and students have always been great travelers. The official case for “academic mobility” is now often stated in impressive terms as a fundamental necessity for economic and social progres...

A lot of animals are afraid during an eclipse1 of the sun. Birds stop singing. Sometimes people too are afraid. Astronomers2 know the dates of eclipses and they are not afraid. The old astronomers of ...

Now let us look at how we read. When we read a printed text, our eyes move across a page in short, jerky movement. We recognize words usually when our eyes are still when they fixate. Each time they f...

Upon reaching an appropriate age (usually between 18 and 21 years), children are encouraged, but not forced, to “leave the nest” and begin an independent life. After children leave home they often...

Baekeland and Hartmann report that the “short sleepers” had been more or less average in their sleep needs until the men were in their teens. But at about age 15 or so, the men voluntarily began c...