单项选择题
岩石的透水性只与岩石中空隙的多少有关。
A、正确
B、错误
岩石的透水性只与岩石中空隙的多少有关。
A、正确
B、错误
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单项选择题
Mark found that there were several ______pages in this book.
Mark found that there were several ______pages in this book.
A.torn
B.tear
C.tearing
D.being torn