A device called an oscilloscope can be used to demonstrate:
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Answer: Because The Terracotta Army was built by the subjects of Qin Shi Huang, First Emperor of the Qin Dynasty and China's 2,133-year imperial era. ... The role of the Terracotta Army was to "guard" the entire mausoleum and Qin Shi Huang believed that the army could protect him in the afterlife.The Terracotta Army is a collection of terracotta sculptures depicting the armies of Qin Shi Huang, the first Emperor of China. It is a form of funerary art buried with the emperor in 210–209 BCE with the purpose of protecting the emperor in his afterlife.The purpose of the Terracotta soldiers was to guard the tomb of the emperor shihuangdi (option "D" is the correct one). The Terracotta Army was built to accompany Qin Shi's tomb who was the First Emperor of China.
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