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【单选题】
阴道栓重约( )A.
1~3g
B.
0.5~1g
C.
5~6g
D.
3~5g
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举一反三
【单选题】Knowing that represents the critical stress of the slender column, which of the following statements is correct?
A.
is related to the critical load and the cross-sectional area of the column, and is independent of the material.
B.
is related to the s lenderness ratio of the column, and is independent of the cross-sectional area.
C.
is only related to the material, the shape and size of the cross-section of the column.
D.
The value of should not exceed the limit of proportional of the material.
【单选题】Knowing that represents the critical stress of the pressure column, which of the following statements is correct? (1) The value of of the slender column is related to the material. (2) The value of of...
A.
(1), (2)
B.
(3), (4)
C.
(1), (3)
D.
(2), (4)
【简答题】机织全棉阿拉伯袍
【简答题】测定岩石粒度组成的常用方法包括 ____。
【单选题】The slender column AB is exerted by an axial pressure force(see the figure). Assume the critical force of the column is P 1j , which of the following statements is correct?
A.
The axis of column AB will keep straight only as ,, and only compression deformation will be produced for the column.
B.
The axis of column AB will keep straight as , and there will be no bending deformation for the column.
C.
The column AB will not keep equilibrium as .
D.
Make in order to ensure the column AB is in equilibrium.
【简答题】测定岩石粒度组成的常用方法包括 。
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