Volunteering
during teenage years has been linked to some major positive effects such as improved grades and increased
self-confidence. These effects aren’t just short-term but have been proved
to affect a teen’s well-being in the years to come.
这是2025年高考英语全国卷2的七选五中的一个句子。
请问句中 such as such as
improved grades and increased self-confidence是什么句子成分？定语？同位语？插入语？请提供语法书上的权威依据。谢谢！
