ques·tion·able /ˈkwɛsʧənəbəl, ˈkwɛʃ, ||ˈkwɛʃnə-/
  (a.)值得懷疑的
  Ques·tion·a·ble a.
  1. Admitting of being questioned; inviting, or seeming to invite, inquiry. [R.]
  Thou com'st in such a questionable shape
  That I will speak to thee.   -- Shak.
  2. Liable to question; subject to be doubted or called in question; problematical; doubtful; suspicious.
     It is questionable whether Galen ever saw the dissection of a human body.T.   -- Baker.
  Syn: -- Disputable; debatable; uncertain; doubtful; problematical; suspicious.
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  questionable
       adj 1: subject to question; "questionable motives"; "a questionable
              reputation"; "a fire of questionable origin" [ant: unquestionable]
       2: able to be refuted [syn: refutable, confutable, confutative]