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【单选题】
钢板在弯曲时,为了不影响其力学性能,通常但D/5( )冷弯(D为圆筒的直径,5为钢板厚度)。A.
>40
B.
<40< /div>
C.
>60
D.
<60< /div>
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举一反三
【单选题】In general, elasticity is a measure of
A.
the extent to which advances in technology are adopted by producers.
B.
the extent to which a market is competitive.
C.
how fast the price of a good responds to a shift of the supply curve or demand curve.
D.
how much buyers and sellers respond to changes in market conditions.
【单选题】In general, elasticity is a measure of
A.
a. the extent to which advances in technology are adopted by producers.
B.
b. the extent to which a market is competitive.
C.
c. how fast the price of a good responds to a shift of the supply curve or demand curve.
D.
d. how much buyers and sellers respond to changes in market conditions.
【简答题】遮栏应采用()制成。 A、绝缘材料 B、铝材 C、铜材
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