D2：2.What is Li Qian doing there?
举一反三
- D2：1.Which country is Li Qian in now?
- What was the girl probably doing last Sunday A: Going to Xiao Li’s birthday party B: Staying at home doing her homework. C: Doing her homework at Xiao Li’s birthday party.
- Can you imagine _________? A: what his doing B: What is he doing C: what he is doing D: he is doing what
- 下列各组量子数哪些是不合理的，为什么？ ① n=2，li=1，mi=0 ② n=3，li=2，mi=-1 ③ n=3，li=0，mi=0 ④ n=3，li=1，mi=+1 ⑤ n=2，li=0，mi=-1 ⑥ n=2，li=3，mi=+2
- 写出下列各组中缺少的量子数： ① n=？，li=2，mi=0，si= +1/2 ② n=2，li=？，mi=-1，si= -1/2 ③ n=4，li=2，mi=0，si= ？ ④ n=3，li=1，mi=？，si= -1/2