Cao Yuan was born in 1996. As he was a young kid, he liked to learn on his own. He was not afraid of asking difficult questions. He spent two years finishing his middle and high school classes. At the age of 14, he started taking classes at a university. Although Cao is young，he shows maturity(成熟)beyond his age.
When he was 24, he published(发表)two papers in Nature on May 6th. Nature is one of the top science magazines in the world. Many scientists dream of publishing their papers in it. But it is really hard. One has to make a very important discovery.
Cao's papers are about graphene(石墨烯)—the thinnest and strongest in the world. Scientists first discovered it in 2004.
However, Cao found that sometimes graphene can change. It can change between a superconductor(超导体)—a material that conducts electricity(导电), and an conductor(绝缘体)—a material that doesn't conduct electricity. With it, scientists can find cheaper and easier ways to use electricity.
Now Cao is a doctoral student studying at MIT. He isn't afraid of failure in his work. "He Just rolled up his sleeves(袖子)and went on working."
1.What did Cao Yuan like to do when he was a kid?
_________________________________________
2.Where did Cao Yuan publish two papers on May 6th?
_________________________________________
3.Why do many scientists dream of publishing their papers in Nature?
_________________________________________
4.When did scientists first discover graphene?
_________________________________________
5.Is Cao Yuan afraid of failure?
_________________________________________
Spring Equinox(春分)is the fourth of the24 solar term(节气). 1. It falls on March 20 this year. On this day, day and night all over the world are equal length. After this day, daytime will last longer than night.
Spring Equinox means the most exciting days of spring have come. 2. Spring is the best time for going outside and flying kites in China. There are also other traditions for this day, such as balancing eggs. In some places, people paint the eggs in many colors and hold egg-balancing competitions. They think special gravitational forces(引力)can help eggs stand on their ends. Actually you can balance an egg on its end any day of the year, have a try for fun.
1._________________________________________
2._________________________________________
你最好每天坚持锻炼。
_________________________________________
他们做朋友多久了？
_________________________________________
只要他明天来，我就告诉他这个好消息。
_________________________________________
长大后你想成为一名医生吗？
Do you want to be a doctor when you_____________?
