sem是干什么的？
一篇四川大学考博阅读题，由于上一次提问回答的作者答案五花八门，我把正确答案这次直接给出来。题目 By stating “I could have had my eyes closed”, the author means (4th paragraph last sentence) .A．T...
Once commercial promotion begins to fill the screen uninvited, the distinction between the Web and television fades. 此处的形容词uninvited修饰的是the screen还是commercial promotion以下为上下文：Anothe...
Well lets find out what precious and semi-precious stones really refer to in the industry in our next paragraph.请问，这个句子中的 refer to 为什么不用被动语态呢？如题