定语从句,修饰economics
如果不用从句,这个句子应该是
oil-importing emerging economics have become more energy-intensive
heavy industry has shifted to oil-importing emerging economics(你的那个“which has shifted to heavy industry”不对）
定语从句里,如果引导词which做从句中一个动+介词短语的宾语,中短语中的介词提到which 前面,我说有可能不准确.有空多翻翻语法书吧,每个语法书上都会有这条
例子
we must conserve this planet of earth on which all lives depend