题目内容
FAST (Five-hundred-meter Aperture Spherical Telescope ) Tianyan was proposed by Chinese astronomer ____in ____and was completed in ____years.
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Human space activities mainly include three major areas: ____, manned spaceflight and ____.
In ____, the earliest extant was printed. A. 868A.D.B. 1150A.D.C. 612A.D.D. 121A.D.
When the history developed to Spring and Autumn Period ,text engraved on tortoise shell and animal bone, called oracle, firstly appeared in China. ______
China firstly used gunpowder for military purposes. ______
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