05选择题5★★☆☆☆
ABC\triangle ABC 中, BC=2BC = 2, AC=1+3AC = 1 + \sqrt{3}, AB=6AB = \sqrt{6}, 则 A=\angle A = ( )
A.
4545^\circ
B.
6060^\circ
C.
120120^\circ
D.
135135^\circ
答案与解析

答案已隐藏