问题 问答题

在测金属电阻率实验中:

①测长度时,金属丝的起点、终点位置如图(a)则长度为:______cm

②用螺旋测微器测金属丝直径,示数如图(b)则直径为:______mm

③读出电压表和电流表的读数:电压表:______;电流表:______.

④在实物图中完成实物连线.

答案

①起点读数为10.00mm;

终点读数为70.50mm;

故长度为:70.50mm-10.00mm=60.50mm;

②固定刻度读数:1mm;

半刻度读数:0.5mm;

可动刻度读数:48.0×0.01mm=0.480mm

螺旋测微器读数=固定刻度读数+半刻度读数+可动刻度读数=1mm+0.5mm+0.480mm=1.980mm;

③电压表最小刻度为0.1V,故读数为0.80V;

电流表最小刻度为0.02A,故读数为0.35A;

④为保证安全,滑动变阻器采用限流式接法;

金属丝电阻较小,故电流表采用外接法;

电路图如图所示:

对照电路原理图连线,如图所示:

故答案为:

①60.50(60.46-60.52均可);

②1.980(1.976-1.984均可);

③0.80V(0.78V-0.84V均可);0.35A;

④如图所示.

阅读理解

阅读理解。

     THEATRE

     City Varieties

     The Headrow, Leeds. Tel. 430808

     Oct 10-11 only A night at the Varieties.All the fun of an old music hall Barry Cryer, Duggle Brown, 6

dancers, Mystina, Jon Barker, Anne Duval and the Tony Harrison Trio. Laugh again at the old jokes and

listen to your favourite songs. Performances:8 pm nightly.

     Admisson:£5 ;under 16 or over 60: £ 4.

     York Theatre Royal

     St Leonard's Place, York. Tel 223568

     Sept 23-Oct 17 Groping for Words-a comedy by Sue Townsend.Best known for her Adrian Mole Diaries,

Townsend now writes about an evening class which two men and a woman attend. A gentle comedy.

Admission: First night.Mon: £2; Tues-Fri:£ 3.25-5.50 ; Sat: £ 3.50-5.75.

     Halifax Playhouse

      King's Cross Strect, Halifax, Tex. 365998 Oct 10-17 On Golden Pond by Erneat Thompson. This is a

magical comedy about real people. A beautifully produced. well-acted play for everyone. Don't miss it.

     Performances: 7:30 pm.

     Admission: £2.Mon: 2 seats for the price of one.

     Grand Theatre

     Oxford Street, Leeds, Tel.502116

     Restaurant and Café Oct 1-17 The Secret Diary of Adrian Mole, Aged 13, Sue Townsend's mosical alaw,

hased on her best-selling book.

      Perlonances: Evenings 7:45 October 10-17, at 2:30 pm. No Monday perfornnaacre

     Admission: Tues-This: £ 2-5; £ 2-6

1. Which theatre offers the cheapest seat?

A. Halifax Playhouse

B. Gity Varieties

C. Grand Theatre.

D. York Theatre Royal

2. If you want to see a play with old jokes and songs,which phone number will you ring to book a seat?

A. 502116

B. 223568

C. 365998

D. 430808

3. We may learn from the text that Sue Townsend is _____.

A. a writer

B. an actress

C. a musician

D. a director

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