活塞环对口、抱死，若注油后将（）窜气甚至更甚。A.冒烟 B.冒气 C.消失

关于滤过器的叙述，错误的是（）

A.减少受检者辐射剂量

B.使射线能量分布均匀

C.吸收低能量X射线

D.优化射线能谱

E.滤过短波射线

患儿，2岁，因不长牙就诊。检查：上前牙区2个锥形小牙，余牙未见，无牙部位无牙槽嵴，颌骨发育正常。该症状是哪个疾病的表现之一（）

A.锁骨一颅骨发育不良

B.外胚叶发育不良综合征

C.创伤

D.掌跖角化综合征

E.眼-牙-指综合征

阅读理解

    Suppose you work in a big firm and find English very important for your job because you often deal with foreign businessmen.Now you are looking for a place where you can improve your English,espeually your spoken English.

     Here are some information you need about English Language training.

     Global English Centre

    *General English in all four skills listening,speaking,reading and writing *3-month(700 yuan),6-month(1,200 yuan)and one-year(2,000 yuan) courses *Choice of morning or evening classes,3 hours per day,

Mon-Fri *Experienced college English teachers. *Close to city centre and bus stops. Tel:67605272  

Add:105 Zhongshan Road,100082  

     Modern Language School *Special courses in English for business,travel,banking,hotel management and office skills. *Small classes(12-16 students)on Sat,& Sun,from 2:00-5:00pm. *Native English teachers

from Canada and USA. *Language lab and computers supplied. *3-month course:1,050 yuan;6-month

course:1,850 yuan. Write or phone:Modern Language School,675 Park Road 100056 Tel:67353019

     The 2lst Century English Training Centre *We specialize in effective teaching at all levels. *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 class during winter and summer holidays. *Entrance exams:June 1

and Dec 1 *Only 15-minute walk from city centre. Call 67801642 for more information

    The International House of English *Three/Six-month English courses for students of all levels at very

cost:60 yuan for 12 hours per week;convenient class hours:9:00-12:00am and 2:00-5:00pm. *A four-

month evening programme for developing speaking skills(same cost as day classes) *Well-trained Chinese and foreign teachers experienced in teaching English as a second/foreign language. *Free sightseeing and

social activities(活动) *Very close to the Central Park. For further information call 67432308

1.You work from 9:00am to 4:30pm every day which schools will you choose?

A.Global English Centred and the International House.

B.Global English Centre and Modern Language School.

C.Modern Language School and the 21st Century.

D.The 21st Century and the International House

2.The 21st Century is different from the other three schools in that____.

A.its teaching quality is better

B.it is nearest to the city centre

C.it requires an entrance examination

D.its courses are more advanced

3.You will probably prefer to go to the International House because it____.

A.offers free sightseeing and social activities

B.costs less than the other schools

C.has a special course in spoken English

D.has native English teachers

4.If you take the evening programme at the International House,you will pay about___

A.60 yuan

B.240 yuan

C.730 yuan

D.1000 yuan

5.The passage is most probably taken from_____.

A.travel book

B.a library guide

C.advertisements from newspapers

D.a project handbook

某工程项目的监理合同约定，监理人负责该工程自开工建设到竣工验收移交为止的全部监理任务，则下列情况中，损失应由监理人承担赔偿责任的是( )。

A．监理人在建筑石材进料单上签署了验收合格意见后，供货商又擅自调换了部分材料，导致工程质量不合格返工造成的损失
B．承包人向监理人提交索赔报告，监理人在规定时间内没有做出审核意见，导致承包人的部分不合理索赔成立，造成委托人的经济损失
C．施工现场发生火灾，监理人发出了停工令，该事件造成的停工损失
D．在工程保修阶段，委托人通知监理人到现场监督承包人保修，监理人未到场造成的委托人损失

直接保值是指如果在期货市场上没有与现货商品相同的商品，就利用与现货商品关系最密切的商品保值。( )