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中国花岗岩类的出露面积，约占我国陆地总面积的10％。
The exposed area of granitoids in China represents about 10% land area of this country.
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中国山区面积占国土总面积的70%。
A. Mountainous areas account for 70 percent of China's total territory.
youdao
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中国山区面积占国土总面积的70%。
A. Mountainous areas account for 70 percent of China's total territory.
youdao