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将一个直角三角板和一把直尺如图放置,如果∠α=43°,则∠β的度数是( ) A....
将一个直角三角板和一把直尺如图放置,如果∠α=43°,则∠β的度数是( )
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A.43°
B.47°
C.30°
D.60°
考点分析:
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