有一个等腰三角形,一个底角是a度,顶角是______度.
180-a×2=180-2a(度),
答:顶角是180-2a度.
故答案为:180-2a.
My father goes to work _____ his Car.[ ]
A. by
B. in
C. on
《一千零一夜》在阿拉伯国家长期被列为禁书()?