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【单选题】
在圆曲线的曲线要素计算公式中,切曲差 q 等于( )。 (A)2T-L (B)2L-T (C)2T+L (D)2L+T[T/]A.
B.
C.
D.
D
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【简答题】Please translate 消毒
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A.
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B.
错误
【单选题】下列有关文学、文化常识表述 不正确 的一项是( )
A.
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B.
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C.
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D.
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