Radio waves carry signals not only between our electronic devices, but also across     1     universe. Electromagnetic radiation (电磁辐射) includes visible light, X-rays     2     other types of energy, all of which travel through space as waves.

Many technologies use radio waves to send and receive signals. Take the radio in your car or home for example.     3     (broadcast) music or news, a radio station’s tower sends radio waves out into the air. Those waves travel to radios, which translate the incoming waves into vibrations. Vibrating speakers inside a radio create the sound waves heard as radio programs. TV broadcasts work in the similar way.

Cell phones and     4     (wire) computer networks also send and receive signals as radio waves, so do radar systems and GPS devices.     5     all of these cases, the device that generates radio waves     6     (call) the sender. The device that picks radio waves up is the receiver, but technology is not the only thing     7     can create radio waves. Lightning gives off radio waves. It also includes lots of     8     (object) throughout the universe.

Radio telescopes on Earth can tune into the radio waves     9     (make) by those distant objects. Observing the waves can let people learn more about what those distant sources are made of and how they’re moving     10     (exact).

For years, artist Ren Jianguo     1     focuses on Chinese ink wash paintings has been exploring how the modern spirit of ink wash paintings can     2    (combine) with traditional Chinese aesthetics (美学).

The artist puts his deep     3    (understand) of Chinese culture and abstract (抽象的) expressionist painting language together     4    (produce) art with a unique modern sense.

Since the beginning of the 21st century, Ren     5    (devote) to developing a new “figure landscape” painting style,     6     innovative combination of traditional Chinese figure and landscape paintings.

Ren’s works inherit (继承) the     7    (peace) sense of traditional Chinese ink wash paintings. Many of his works were inspired by the lifestyle that the poet Tao Yuanming described in his poetry.

Born in Beijing and late     8    (travel) to Australia, Ren made a name for himself as early as 1985, when he brought     9    (he) work to the milestone national art exhibition of Chinese contemporary art China Youth in Progress. The exhibition paved the way (为……铺平道路) for the 85 New Art Movement, which has been seen by many     10     an introduction to Chinese contemporary art.

No doubt, one of the most admired Chinese paintings of all time is the Qingming Shang He Tu. The painting is on a silk scroll (卷轴) that is 24.8cm wide and 528.7cm long,     1     (bear) Emperor Huizong’s name. Created by Zhang Zeduan, it represents the daily life of people and the landscape of then Bianjing,     2     was the capital during the Northern Song.

After its appearance, this amazingly detailed painting quickly     3     (become) a national treasure. Although the original painting was lost for some time, it is now     4     (proud) placed in the Palace Museum in Beijing. As an artistic creation, the piece has been admired and court artists of subsequent     5     (dynasty) have made many copies.

The theme celebrates the festival spirit and prosperous street scene at the Qingming Festival,     6     time when Chinese people visit their ancestors’ graves (坟墓).

    7     (paint) on the silk scroll, the piece of art reveals the lifestyle of all levels of society and it gives us a rare insight     8     daily life in ancient China. Its great appeal is that it provides a whole picture of ordinary people’s lives in the Song Dynasty.

The painting     9     (display) every few years. However, using computer animation, it recently has been remade into a digital version which contains moving characters and objects for all     10     (enjoy). In 2010, an electronic version was created for exhibition at the Shanghai Expo.

A photographer in Xi’an, attracted millions of views with short videos about ordinary seniors on a video-sharing platform. The videos are all about how Xu Kai took pictures of the     1     (age) people he came across on the street and     2     the end of each video, the 29-year-old gives the elderly subject     3     framed picture he took of them. Some netizens leave messages below those short videos, saying Xu’s example reminded them of their own grandparents. Others even imitated Xu in taking pictures for the seniors. “Every old person is a part of history,” said Xu,     4     (add) that behind each big smile in the photos, the person may have experienced the stormy waves of life. Xu has more than a million     5     (follow) online, and there     6     (be) nearly 10 million likes on his videos so far. Xu is good at     7     (casual) talking to people on the street and he prepares a gift for each of the people in his pictures. “Sometimes my friends tell me that it’s not worth     8     (pay) for the gifts, but I believe     9     I did is out of     10     (happy), and I want to make more of them feel happy,” he said.