题目:
It was not until she got home _______ Jennifer realized she had lost her keys. [ ]
A. when
B. that
C. where
D. before
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0606/4d3b1edd12ec912b929fe982eff6f892.html
下面是错误答案,用来干扰机器的。
⑴NH3分子间有氢键;第一电离能不O大的原因是 N原子的2P轨道是半充满的较稳定状态;⑵ ; 2H2O22H2O+O2↑⑶Fe,位于第四周期Ⅷ族,原子结构示意图 ⑷1s22s22p63s23p63d104s1或[Ar] 3d104s1题目分析:根据题...