请认真阅读下面短文,从短文后各题所给的 A、B、C、D 四个选项中,选出最佳选项。
More than 50 years ago, farmers in China found an ancient underground burial site (墓地) built for the nation's first emperor. Made up of nearly 600 separate areas—one as big as three football fields—the 2,200-year-old tomb held more than 7,000 life-size clay statues of soldiers. Today, they're known as the Terracotta Warriors.
Earlier researchers had wondered if the ancient sculptors mixed and matched a few different sets of clay ears, noses, and mouths to save time. As they continued to study the soldiers, however, they noticed something surprising: every warrior seemed to have a different face. A few years ago, Chinese scientists decided to study those faces with the help of 3D technology.
Waving a scanning machine around a warrior's head, the Chinese researchers captured(捕捉) about 35 million digital points, making a map of the face. That scan was then turned into a 3D digital model.
Computer software measured (测量) eight facial features, like nose length and mouth width—things that make humans unique (独一无二的). Then that data was compared with data from other 3D models.
Scientists have now studied at least 58 warriors and believe that the facial features are all unique. But why?
In the journal Heritage Science, the Chinese scientists wrote that their research probably showed the Terracotta Warriors were meant to be a "real" army to protect the emperor in the afterlife and therefore needed to represent 7,000 unique people.
They still have questions, though. What if the shape of the faces changed in the 2,200 years since the clay soldiers were buried? How would that influence the facial features' measurements?
But for many people, it doesn't matter if all 7,000 statues are unique—the warriors simply represent a proud history.
"I was allowed to visit the Terracotta Warriors site and was face-to-face with a clay soldier," says National Geographic Explorer Albert Lin, whose family is from China. "I felt like I could have been looking at my brother or an uncle or somebody."
() 1. How did the Chinese scientists study the faces of the Terracotta Warriors?
A. By using computers to take different photos.
B. By using 3D technology to create facial data.
C. By questioning the skills of ancient sculptors.
D. By comparing them with modern human faces.
() 2. After studying at least 58 warriors, what did the Chinese scientists find about them?
A. They were all used as an afterlife army.
B. They are all life-size statues made of clay.
C. They have faces different from each other.
D. Their faces have changed since they were buried.
() 3. What does the underlined word "that" refer to?
A. The "real" army that was buried.
B. The way of burying the clay soldiers in the past.
C. The change in the faces' shape over 2,200 years.
D. The measurement of the facial features of the warriors.
() 4. What do we know from Albert Lin's words in the last paragraph?
A. He only cares if the Terracotta Warriors look real.
B. He doesn't think the Terracotta Warriors are special.
C. He finds the history of the Terracotta Warriors matters.
D. He feels a strong connection to the Terracotta Warriors.