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【单选题】
如图，在△ABC中，AB=AC，∠A=36°，BD平分∠ABC，DE∥BC，则图中与△ABC相似的三角形（不包括△ABC）的个数有 [ ]A.
0个
B.
1个
C.
2个
D.
3个
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【单选题】若 有意义，则x的取值范围