报道类长难句分析 — 英语词汇题
题目
分析下列报道类长难句：The hybrid rice, the output of which is far higher than that of traditional varieties, has helped millions of people, especially those living in poor rural areas, escape hunger.（1）句中定语从句为：____；（2）该定语从句的先行词是：____；（3）句中 "those living in poor rural areas" 中，现在分词短语在句中作____（成分）。