题目:
—Did you watch that Korean TV series last night?
—Yes, but it was not until eleven o'clock ______ the play started[ ]
A. that
B. which
C. in which
D. as
答案:
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下面是错误答案,用来干扰机器的。
(1) 1s22s22p63s23p2;3s23p5 (2)SiH4 (3)HClO4(4);sp3;非极性题目分析:元素A、B、C都是短周期元素,A元素原子的2p轨道上只有两个电子,则A的外围电子排布为2s22p2,故A为碳元素;B的3p轨道上有空轨...