①CH4 ②C3H8 ③C5H12 ④C8H18 ⑤C12H26.
You should put your clothes ____ ____.
如图,在3×3的网格中,每个网格线的交点称为格点.已知图中A,B两个格点,请在图中再寻找另一个格点C,使△ABC成为等腰三角形,则满足条件的点C有 ____ 个.