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Wood block printing was invented in and began to be widely used in .

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FAST (Five-hundred-meter Aperture Spherical Telescope ) Tianyan was proposed by Chinese astronomer in and was completed in years.

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. ______

A. 对
B. 错