这句话对么？后面的是同位语么

Question

The rare-earth metal dysprosium is a member of the lanthanide series, it is in group IIIb of the perodic table.

Answer 1

这句话是错的 应该是The rare-earth metal dysprosium is a member of the lanthanide series, which is in group IIIb of the perodic table. 把it 改为which 是叫非限制性定语从句 你就记住同位语的先行词大概有fact news idea thought question reply report remark等 而且后面的连词一般都是that

Answer 2

it is in group IIIb of the perodic table.不是同位语从句。并且这个句子是一个错句。逗号是不能连接两个句子的。我们可以将it改为which构成非限制性定语从句，也可以在it之前加连词and构成并列句。

Answer 3

您好，这个是一个错句，应该把逗号改成句号, 或者把it改成which .
其中it指代金属。本回答被提问者采纳