根据《城镇燃气设计规范》,下列管材中可以用于次高压燃气管道的是()。A、聚乙烯管 B

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问题:

根据《城镇燃气设计规范》,下列管材中可以用于次高压燃气管道的是()。

A、聚乙烯管

B、机械接口球墨铸铁管

C、L245钢管

D、钢骨架聚乙烯管

考点:城镇天然气操作工考试城镇燃气设计规范城镇燃气设计规范题库
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阅读理解。
     Suppose you work in a big company (公司) and find English very important for your job because 
you often do something with foreign businessmen.  Now you are looking for a place where you can 
improve (提高) your English, especially your spoken English.     
     Here are some advertisements  (广告)  about English language training from newspapers. You may
 find the information you need.
                                          Global (全球的) English Centre
General English in all four skills (技能): Listening, Speaking, Reading and Writing.
3-month  (700 yuan) , 6-month  (1 200 yuan) and one-year (2 000 yuan) courses (课程).
Choice of morning or evening classes, 3 hours every day, Mon. -Fri.
Experienced (有经验的) college English teachers.
Close to bus stops.
Tel: 7605272
Add: 105 Zhongshan Road, 400035

                                            Modern Language School
Special courses in English for business, travel, banking, hotel management (管理) and office skills.
Small classes (12 ~ 16 students) on Sat. & Sun. from 2: 00-5: 00 pm.
Native  (本族的)  English' teachers from Canada and the U. S. A.
Language labs and computer-supplied  (供给) 3-month courses:
1 050 yuan; 6-month courses: 1 850 yuan.
Address: Modern Language School, 675 Park Road, 400076
Tel: 7353019

                                      The 21st Century English Training Centre
We specialize (专门研究) in effective (有成效的) teaching at all levels (各等级).
We offer morning or afternoon classes, both of which last three months and a half at a cost of 800 yuan.
We also have a six-week TOEFL preparation (托福预备) class during winter and summer holidays.
Entrance Exams: June l and Dec.1.
Only 15-minute walk from the city centre.

        The International  (国际的) House of English
Three/Six-month English courses for students of all levels at very low cost: 60 yuan for 12 hours a week; 
convenient  (方便的)  class hours: 9:00-12 :00 am and 2: 00-5: 00 pm.
A four-month evening programme for developing speaking skills  (the same cost as day classes),
2 hours every evening.
Well-trained Chinese and foreign teachers experienced in teaching
English as a second / foreign language.
Free sightseeing and social activities  (免费观光旅游和社会实践).
For further information,  call 7432308.
1. You work from 9:00 am t0 4:30 pm on weekdays; which  school will you choose?            
A.  Global English Centre and Modern Language School.              
B. Global English Centre and the 21st Century. English  Training Centre.             
C.  Modern Language School and the 21st Century English  Training Centre.               
D.  The 21st Century English Training Centre and the International House of English.
2. The 21st Century English Training Centre is different from  the other three schools in that ______.           
A.  its teaching quality (质量) is better             
B.  it is the nearest to the city centre             
C.  its courses are more advanced (高级的)             
D.  it needs an entrance examination
3. You will probably prefer to go to the International House of  English because it ______.               
A.  offers free sightseeing and social activities                 
B.  has a special course in spoken English                
C.  costs less than the other schools                 
D.  has native English teachers      
4. If you take the evening programme at the International House of English, you will pay
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A. 60    
B. 240    
C. 720    
D. 1000 
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A.  Global English Centre               
B.  Modern Language School               
C.  The 21st Century English Training Centre               
D.  The International House of English
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个人抵押授信贷款若提前还款,目前一般采取( )方式。

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SQL语句删除索引的语句是()

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