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【判断题】
粘土土壤孔隙度为５０％～６０％，因此，粘土土壤孔性好
A.
正确
B.
错误
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举一反三
【单选题】岩石的流动孔隙度ϕff:()
A.
岩石的总孔隙体积与岩石的外表体积之比。
B.
岩石中的有效孔隙体积与岩石的外表体积之比。
C.
岩石中流体能在其内流动的孔隙体积与岩石的外表体积之比。
D.
岩石的孔隙体积与岩石的体积之比。
【单选题】Water， water every where. It lasted almost two months ， but in August it ended. It left 45 people dead and $10 billion worth of damage in nine states of USA. It was quite a big Mississippi flood eve...
A.
was the heaviest one in the history
B.
happened in Missouri and Illinois states
C.
happened in less than twenty percent of the states of U.S.A.
D.
was recorded several times
相关题目：
【单选题】岩石的流动孔隙度ϕff:()
A.
岩石的总孔隙体积与岩石的外表体积之比。
B.
岩石中的有效孔隙体积与岩石的外表体积之比。
C.
岩石中流体能在其内流动的孔隙体积与岩石的外表体积之比。
D.
岩石的孔隙体积与岩石的体积之比。
【单选题】Water， water every where. It lasted almost two months ， but in August it ended. It left 45 people dead and $10 billion worth of damage in nine states of USA. It was quite a big Mississippi flood eve...
A.
was the heaviest one in the history
B.
happened in Missouri and Illinois states
C.
happened in less than twenty percent of the states of U.S.A.
D.
was recorded several times
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