pick up中up 是什么词性

问题描述:

pick up中up 是什么词性

是副词英语中,代词放的介词之后,副词之前,若是名词则放在副词之后例 There is a book on the floor,please pick it up.Please pick up the book.类似的有 look up,think 等例A: I don't konw this word. B:y...