二级英语

The F.B.I. regularly makes up a list of the nation’s ten worst criminals. This list, called the “Ten Most Wanted.“ is posted as widely as possible. Pictures of the wanted men and women appear in...

The feats accomplished by the strongest men and women are almost beyond belief. The most incredible stunt of all was carried out by Frank Richards. He stood next to a cannon which fired a cannon ball ...

Sometimes, parts of the body stop working properly and we get sick. This may happen because the body becomes infected by germs from outside, or because something is damaged inside the body. Doctors do...

A fit body is one that can perform everyday tasks without getting tired and breathless. Staying fit helps people stay healthy into old age. Fitness depends on eating a balanced diet and exercising reg...

Look at people in the street, and you will notice many differences. But look again and see if you can spot the similarities-such as the way people shrug their shoulders, frown when they are thinking, ...

Surprises often come in boxes. Birthday presents wrapped in colorful paper, brown paper packages mailed from a friend. No matter what kind of box it is, people like to open it up and see what’s insi...

Elections are the lifeblood of a democracy. The word democracy literally means “the people rule,” an important concept in America’s history. In the mid-1700s, England began passing laws that mad...

Time travel is clearly a trickier proposition than space travel, though. Put simply, Einstein’s idea was that the universe has it’s own “time”, and these vary as objects move. The faster an ob...

In 1971, after Einstein’s death, two scientists were able to carry out a crucial experiment. They used two atomic clocks, synchronized them, and placed one on a plane, while the other stayed in the ...

The experiment was replicated in 1996 with advanced technology, and it was proved again--with an even bigger time difference proves that not only is time “warp-able”, but Einstein was arguably the...