In a 2004 ________ of college students, it was found that 60 percent of students work during their spare time.


  1. A.
    view
  2. B.
    inspection
  3. C.
    observation
  4. D.
    survey
D
解析:
題意:“在一個2004年的調(diào)查中發(fā)現(xiàn)……”,survey調(diào)查。
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