根据括号内的汉语提示填入适当的词完成句子。

1. Einstein developed __________(理论)of relativity.

2. Christopher Columbus was a ___________(勇敢的)man to go where no one had gone before.

3. Now Daniel's father is the youngest __________(教授)in his university.

4. When people in _________ (权力) is absent, people will do as they like.

5. the sooner the task will be done, the fewer people can be _________(牵涉)in.

某兴趣小组为了测量一待测电阻R_x的阻值，准备先用多用电表粗测出它的阻值，然后再用伏安法精确地测量，实验室里准备了以下器材：

A．多用电表  B．电压表V₁，量程6V，内阻约10kΩ

C．电压表V₂，量程15V，内阻约20kΩ   D．电流表A₁，量程0.6A，内阻约0.2Ω

E．电流表A₂，量程3A，内阻约0.02Ω   F．电源：电动势E=6V

G．滑动变阻器R₁，最大阻值10Ω，最大电流2A  H．导线、电键若干

（1）①在用多用电表粗测电阻时，该兴趣小组首先选用“×10”欧姆挡，其阻值如图甲中指针所示，为了减小多用电表的读数误差，多用电表的选择开关应换用______欧姆挡；

②按正确的操作程序再一次用多用电表测量该待测电阻的阻值时，其阻值如图乙中指针所示，则R_x的阻值大约是______Ω．

（2）①在用伏安法测量该电阻的阻值时，要求待测电阻的电压从0开始可以连续调节，则在上述器材中应选出的器材是______（填器材前面的字母代号）．

②在线框内画出用伏安法测量该电阻的阻值时的实验电路图．