【简答题】在重力勘探中,要获得探测对象产生的重力异常,一般需要具备哪些条件?
【判断题】有时,典型调查的调查单位比较少,调查比较深入。( )
【简答题】Nancy tells her that her disease is in .
【单选题】—Is this Mr. White's office, Mary? —Yes, ______.
【单选题】Mary's pale face is a _____ that she _____ rather weak after the operation.
【单选题】明式家具中三根直材交叉接合时,两根横材的位置关系可能不是下列的哪一项?