【单选题】There is no______answer to the question at present. A. Science B. scientist C scientific D.scientists
【单选题】下列各项可以作为幻灯片背景的是( ) 。
【简答题】加强党的政治建设,把准( )是重中之重。
【简答题】根据句子意思填入恰当。 1. All the important discoveries are based on scientific ________ (观察) and careful research. 2. The suggestion you put forward yesterday is under ________ (考虑). 3. He has made a s________ ...