18. 在上題中之梁斷面，若須考慮壓力筋之貢獻，則此梁斷面之彎矩計算強度 (Mn) 值為何？ (A) 122 tf-m (B) 127 tf-m (C) 132 tf-m (D) 137 tf-m

3. Based on the solubility rules, which of the following will occur if solutions of CuSO4(aq) and BaCl2(aq) are mixed? (A) CuCl2 will precipitate; Ba2+ and SO42 – are spectator ions. (B) CuSO4 will precipitate; Ba2+ and Cl – are spectator ions. (C) BaSO4 will precipitate; Cu2+ and Cl– are spectator ions. (D) BaCl2 will precipitate; Cu2+ and SO42 – are spectator ions. (E) No precipitate will form.