1. 系。 例如：
① Finally the workers got an answer that the government could do nothing to raise their wages.
工人们最终得知政府不会采取 任何措施来增加他们的工资。
② They are familiar with the opinion that all matter consists of a toms.
他们很熟悉 这一观点，所有的物质都是由原子构成的。
2. 同位语从句与that引导的定语从 句的区别：
1） 从先行词来看
同位语从句 与名词在本质上是同一的，是形式与内容的关系，该名词是需要做特殊说明的抽 象名词。例如：
They were delighted at the news that their team had won
当听到他们的球队赢了的消息时，他们欣喜若狂。
逻辑关系：The news was that their team had won.
2) 从引导词来看
引导词that在同位语从句中是连词，只起连接作用，无具体含义，that不可省略；that在定语从句中是 关系代词，他在从句中充当一定成分：主语或宾语，有具体词意 ，作宾语时还可以省略。试比较：
①The factory (that) we visited yesterday is a chemical one.
