47. 將 POCl3 分子結構表示為則各原子的形式電荷(formal charge)為何? (A) P = 0, O = 0, Cl = 0 (B) P = +1, O = 0, Cl = –1 (C) P= –1, O = –1, Cl = 0 (D) P = +1, O = –1, Cl = 0