函数f（x）在区间[-3，-1]连续且平均值为6，则=（）。 A.18 B. C.1

下列说法中，正确的是（　　）

A．质点做直线运动时，其位移的大小和路程一定相等

B．质点做曲线运动时，某段时间内位移的大小一定小于路程

C．两个位移相同的质点，它们所通过的路程一定相等

D．两个质点通过相同的路程，它们的位移大小一定相等

图示结构用位移法计算时的基本未知量最小数目为：（）

A.10

B.9

C.8

D.7

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 with 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.

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

York Theatre Royal

     Tel. 223568 St Leonard's Place, York.

     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

     Tel. 365998 King's Cross Street, Halifax.

     Oct 10-17 on Golden Pond by Ernest Thompson. This is a magical comedy bout real people. A beautiful

produced, well-acted play for everyone. Don't miss it.

     Performances: 7:30pm.

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

Grand Theatre

     Tel. 5022116 Restaurant and Cafe. Oxford Street, Leeds.

     Oct 1-17 The Secret Diary of Adrian Mole, Aged 13. Sue Townsend's musical play, based on her best-selling

book.

     Performances: Evening 7:45. Oct 1-17, at 2:30 pm. No Monday performances.

     Admission: Tues-Thurs: ￡2-5; Fri & Sat: ￡2-6.

1. Which theatre offers the cheapest seat? [ ]

A. Halifax Playhouse.

B. City 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

老年环( )

A．角膜周围血管增生
B．角膜边缘出现灰白色混浊环
C．角膜溃疡
D．角膜边缘出现黄色或棕褐色色素环
E．角膜软化