A:①②
B:②③
C:①④
D:②④
下句中有一处错误,请你找出并改正。
Tom has lived in Sydney and New York, but he doesn't like neither city very much.
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已知a为IIA族元素,b为IIIA族元素,它们的原子序数分别为m和n,且a、b为同一周期元素,下列关系式错误的是 ( )