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【单选题】
(2020-3)设奇函数 在 上具有连续的导数,则( )A.
是奇函数;
B.
是偶函数;
C.
是奇函数;
D.
是偶函数.
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A.
For the first time
B.
From time to time
C.
For the time being
D.
All the time
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A.
Coil spring
B.
Air spring
C.
Leaf spring
D.
Pressure spring
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