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【单选题】
成年人的颈干角小于（ ）会出现髋内翻，并伴有腿长度的减小
A.
110°
B.
115°
C.
120°
D.
125°
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【单选题】某电感上标有“54R1”，它表示( )
A.
540mH
B.
540uH
C.
54.1mH
D.
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查看完整题目与答案
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