阅读理解。

Name: James Brown

Subjects:  Business English, Reading and Writing

Experience

      2005-Now Bell College Teaching Centre of English Teaching ESP classes including

work with the Police Force. 

      2001-2005 Business College of City University Mainly in Examination Courses and

Business English, including business writing.

      1997-2001 English College of City University Teaching special English to students from 

other countries.

      1993-1997 Gama-Bell School of English Teaching Business English classes with local British

      Airways representatives.

      1990-1993 Ashtree Primary School and Summer School Class teacher (8-9 years olds)

1. James Brown is a ________.

A. teacher

B. student

C. worker

D. policeman

2. James Brown was in ________ in 2002.

A. Gama-Bell School of English.

B. Bell College Teaching Centre.

C. Business College of City University.

D. English College of City University.

3. James Brown was in Ashtree Primary School for ________ years.

A. l-3

B. 3-4

C. 5-7

D. 8-9

4. This passage is about Mr. Brown's ________.

A. hobby

B. life

C. family

D. experience

小华同学用电池组（电压为3V）、电压表、电流表和滑动变阻器等实验器材，测量标有“2.5V”字样小灯泡的电功率．

（1）如图所示是小华连接的实物连接图，其中有一处连接错误，请在错误连线上打“×”，并用笔画线代替导线画上正确的连线．

（2）电路错误改正后，小华闭合开关S，发现无论怎样调节滑动变阻器灯泡都不亮，且电压表有示数、电流表示数始终为零．造成这种故障的原因是______．

①小灯泡L的额定功率为______W．

②小灯泡消耗的功率与其发光亮度之间的关系是______．

③小华通过表中的数据，求出了灯泡在不同发光状态下的电阻值，发现这几个电阻值相差较大．其主要原因是______．