退耕还林、退耕还湖、退耕还草()
A. 对
B. 错
The Silk Road has an important place in history mainly because of its _____.
A. rich cultural legacy
B. commercial route
C. spread of Buddhism.
D. legendary stories
China get the techniques for making glass from _____.
A. Gutenberg
B. the Islamic world
C. India
D. Samarkand
When did China develop the woodblock printing?
Around 700 AD.
B. In 743.
C. In 1895.
D. Before 1000.