在图所示电路中，有一根导线尚未连接，请以笔画线代替导线补上，要求：当滑动变阻器滑片P向左移动时，电压表示数变小。
The director couldn't figure out _______ made his assistant spend so much time in doing the survey. [ ]
A. what it was that
B. why it was that
C. how that was
D. what was it
支配舌前2/3味觉的神经（）
A.面神经
B.三叉神经
C.舌神经
D.舌下神经
E.展神经
