39. 用以表示地貌之基本等高線為: (A)計曲線 (B)助曲線 (C)主曲線 (D)首曲線

6. Which statement is false for \(\text{O}_2\), \(\text{O}_2^{2-}\), and \(\text{O}_2^{2+}\)?(A)There are bond orders of 2 for \(\text{O}_2\), 1 for \(\text{O}_2^{2-}\), and 3 for \(\text{O}_2^{2+}\).(B)The highest occupied molecular orbital of \(\text{O}_2^{2+}\) is bonding.(C)The highest occupied molecular orbital of \(\text{O}_2\) is antibonding.(D)All of them are diamagnetic.