【单选题】Next door to ours _________, who has just return from abroad.
A.
where lives an old man
C.
where does the old man live
【单选题】It was the old man ______ has reported the fire.
【判断题】斯金纳不赞成学习的SR公式,把学习公式改成SOR公式。强调有机体内部的变化导致行为变化。
【单选题】A man has to make ______ for his old age by putting aside enough money to live on when old.
【判断题】当HBV复制时,内源性DNA聚合酶修补短链,使之成为完整的双链结构,然后进行转录。
【单选题】A man has to make______ for his old age by putting aside enough to live on when old.
【单选题】The old man _______ since ten years ago.
【简答题】It was the old man___has reported the fire.