根据句意及所给的中文提示写出所缺单词。

1. We are still _____ (影响) by Confucius' works.

2. What's your _____ (观点) of this great book?

3. Gone with the Wind is _____ (认为) to be one of the greatest books in American literature.

4. Compass was invented in _____ (古老的) China.

5. They found treasure in a _____ (山洞) of a mountain far away.

小明同学用如图甲所示的电路研究灯泡L(2．4V，1.0W)的伏安特性，并测出该灯泡在额定电压下正常工作时的电阻值。

(1)在闭合开关S前，滑动变阻器触头应放在   端。(选填“a”或“b”)

(2)根据电路图，请在图乙中将实物图补充完整。

(3)实验后作出的U-I图象如图丙所示，灯泡在额定电压下工作时的电阻值R=   (结果保留两位有效数字)，该测量值比真实值偏    (选填“大”或“小”)，丙图中图线发生弯曲的主要原因是                                                       。