Gunpowder can be widely used in.
A. weapons
B. fireworks
C. steel age
D. English class
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1000 years ago, Chinese invented paper-making.
A. 对
B. 错
Writing brushes, Chinese inks, rice paper and ink slabs are the basic tools of calligraphy.
A. 对
B. 错
The body of gu qin is made of wood and the strings are made of silk.
A. 对
B. 错
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