已知线段A B．延长线段AB至 C．使BC=34AB，反向延长线AB至D，使AD=1_爱下问搜题

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问题解答题

已知线段AB．延长线段AB至C．使BC=

3

4

AB，反向延长线AB至D，使AD=

1

3

AB，P为线段CD的中点，已知AP=17cm，求线段CD，AB的长．

答案

设AB长度为：x cm，则BC=

3

4

x cm，AD=

1

3

x cm，DC=x+

3

4

x+

1

3

x=

25

12

x cm，

因为点P是CD中点，则DP=

25

24

x cm，AP=DP-DA=

25

24

x-

1

3

x=

17

24

x=17cm，

所以x=AB=24cm，DC=50cm．

阅读理解

阅读下列应用文及相关信息，并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。
首先，请阅读下列广告信息：

A. ENGLISH LANGUAGE CENTER
◇ Classes for beginners for 3 months
◇ Focus on grammar as well as writing and oral English
◇ Open from 3:00 p.m. to 9:30 p.m.
◇ Small classes with maximum 8 students
◇ Course fee: $300 (10% discount for the first to enroll)
◇ Tel: 22325445

B. HALIFAX PLAYHOUSE
◇ Ring’s Cross Street, Halifax
◇ Open from Oct. 10th – 17th on Golden Pond by Emest Thompson
◇ This is a magical comedy about real people. A well-acted play for everyone.
Don’t miss it.
◇ Performances: at 7:30 p.m.
◇ Admission: $3.
◇ Tel: 3659 9988

C. LONDON COLLEGE OF ENGLISH
◇ Classes for foreign students of all levels
◇ 3 months, 6 months, 9 months and 1 year course
◇ Focus on spoken language
◇ Open through all year from 8:00 a.m. to 5:00 p.m.
◇ Small class with maximum 12 students
◇ Course fee for English for one year: $1,200
◇ Discount at shorter period of study
◇ Tel: 22342381

D. EXHIBITIONS OF OIL PAINTINGS
◇ Gallery of the Central Academy of Fine Art
◇ A combination of Eastern and Western Art
◇ Open from 8:00 am to 6:00 p.m., January 3rd to 19th
◇ Admission: $2 for adults, $1 for students
◇ Tel: 33569875

E. WESTERN ART SHOW
◇ China National Art Museum
◇ European modern art, Chinese art and African ancient art
◇ Open from 7:30 am to 4:00 pm from January 6th to 20th
◇ Admission: $3 for adults, $1.5 for middle school students
◇ Tel:25545569

F. GRAND THEATRE
◇ Oxford Street, Leeds
◇ Restaurant and Café
◇ Admission: Tues-Thurs. $2-6; Fri. & Sat. $4-8
◇ Sue Townsend’s musical play
◇ Performances: Evenings at 9:45am, October 10 -17; at 2:30 p.m. No Monday performance.
◇ All kinds of drinks offered
◇ Tel: 52011611

然后请阅读下列Wendy等人的信息，并匹配上面适合他们的广告信息。
小题1:Wendy, a student who is interested in comedy and performing, happens to be free on Oct. 12th and wants to relax herself by enjoying some performances, but she has no more than $4.
小题2:Carol happens to be free on October 15th and plans to enjoy some performances while having a cup of coffee.
小题3:Jenny, a student who is a major in art is interested in Italian art as well as Chinese, will be free after school at 4:30.
小题4:Tom will go to study in the USA for a master’s degree. He wants to have a full-time special training for several months to improve his oral English.
小题5:Mark, a worker of an export company, needs to improve his writing and oral English. He can only go to the training class after work every day.

问答题简答题

滚柱式单向离合器的工作过程。