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【单选题】
下列对象执行偏移命令后,大小和形状保持不变的是( )。
A.
直线
B.
圆弧
C.
D.
椭圆
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A.
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B.
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A.
looking out of
B.
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C.
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【单选题】发电机发电量过大的原因是( )
A.
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B.
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C.
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D.
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A.
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B.
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C.
D.
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A.
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B.
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C.
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D.
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