题目

 “各能级最多容纳的电子数，是该能级原子轨道数的二倍”，支撑这一结论的理论是( ) A．构造原理                                                 B．泡利原理 C．洪特规则                                                 D．能量最低原理 答案：B ________ more energy to my study instead of being crazy about Internet games, I would be sitting in a comfortable office now． [　　] A．If I devoted B．Had I devoted C．Would I be devoted D．Should I be devoted