Many people may not know the name of the girl in the photo but her large and clear eyes can often be seen in newspapers.

    Her name is Su Mingjuan and now she's more than 30 years old. In 1991, when Su was only 8 years old, Xie Hailong, a photographer from China Youth Daily, took a picture of her in a classroom which was in a poor condition in Anhui.

    The photo was later used as a poster for Project Hope. It has become a symbol of the country's efforts to make more people realize the importance of education. Her large and clear eyes crying for knowledge in the picture have moved a big number of people across China, who have donated (捐赠） money to help children continue their schooling since then.

    Having received help from Project Hope, Su herself has also been helping poor students. She began to study at Anhui University in 2003. After entering college, she wrote to the China Youth Development Foundation, the organizer of Project Hope, to transfer her living allowance (补助) of 900 yuan a term to other students in need. And she began to do part-time jobs to make money. After graduation, Su found a job in a bank. Since she started working, she has donated 1,000 yuan every year.

    Since it was started in 1989, Project Hope has received about 13 billion yuan in donations from home and abroad. And the money has been used to build over 19,000 primary schools and help over 5. 5 million children.

Playing with apps on smart phones is very common among young people. Let's try some special apps and enjoy them.

    IQ scores have been measured (测量)since 1916, when Alfred Binet developed his intelligence list as follows:

    Some very famous people are known for their high IQ level. Jill St. John who has the highest score on this list was a major American film actress during the 1960's and 1970's. Jill was chosen to the University of California at the age of 14.

    Scientists have estimated (估算)the IQ scores that some famous historical people might have got. This was done by looking at their work and their ideas and the way they put them together Leonardo da Vinci gets that high score not only for his art but also for his idea of the helicopter (直升飞机). Without modern scientific tools, he created a lot of design drawings and patterns, which was ahead of his time.

A: Mr. Liu, can I ask you some questions about Mars?

B: Sure, go ahead.

A: Is Mars hot?

B: Mars might look red-hot. But don't let its color fool you. Mars is much farther away from the sun than Earth. So it gets less light and heat.

A: Why "Mars"?

B: Mars takes its name from the Roman god of war (罗马战神). In China, the red color makes people think of fire. So they call the planet "fire star".

A: Are there Martians on Mars?

B: Unluckily, we haven't found any "people" on Mars yet. They are kind of like Santa Clause. Nobody can see them, but many people believe they are real.

A: Will we lose weight on Mars?

B: Living on Mars could be good in many ways. For example, you might not need to go on a diet to lose weight. If you weigh 50kg on Earth, you will only weigh 19kg on Mars. This is because the surface gravity (表面重力) on Mars is only about 38 percent of that on Earth. Do you want to know your weight on Mars? Just multiply your weight by 0.38. That's it.

A: Thank you. We know a lot about Mars now.

B: You're welcome.