判断题
煤层或岩层的构造裂缝中贮存有大量高压瓦斯是引起矿井瓦斯喷出的内在因素。
正确
错误
煤层或岩层的构造裂缝中贮存有大量高压瓦斯是引起矿井瓦斯喷出的内在因素。
正确
错误
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单项选择题
The most remarkable bronze statue in the tomb of Liu Sheng, King Jing of the Western Han dynasty, is ().
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B．Gold and silver inlaying copper teapot with bird zhuan characters
C．Changxin Palace Lamp
D．White jade carved with double dragons
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A．
B．
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D．