Question

which在定语从句中作什么成分

Diabetes currently afflicts some 246 million people around the world, which the figure expected to rise to 380 million by 2025, research by the International Diabetes Federation show.

which在定语从句中作什么成分

Answer 1

which
在定语从句中可以作主语，宾语。可以引导限制性定语从句，非限制性定语从句。
例如：
A
plane
is
a
machine
【which主语
】can
fly.
The
book
【which
宾语】he
gave
me
yesterday
is
wonderful!
The
game
ended
on
a
tie,【which
非限制性定语从句，作主语】
was
beyond
their
expectation.
祝你开心如意！

Answer 2

本句是由which引导的非限定性定语从句，which在从句中充当show的宾语。
同时，反驳 咲かないで - 见习魔法师 二级 说的，本句which不能换成that，因为非限定性定语从句的引导词不能用that.

Answer 3

可替换成that ，充当从句的主语，引导一个新的句子，有连接的作用

Answer 4

算是个引导词吧~