【判断题】普通单向阀具有正向导通,反向截止的功能。
【单选题】Which maxim in cooperative principle is violated in the following B’s sentence“A: Where’ve you been? B: Out.”
【简答题】Where’ve you been ______ ?
【判断题】In Paragraph 10, “Where’ve you been” should be taken literally. It implies that the narrator is rather ignorant and does not know what everybody knows.