下列关于规划区的表述，哪项是错误的？( )A．规划区宜以完整的行政管辖区为界限 B．

每天都会有新的盐分进入海水，海水中也有盐分进入海床沉积层、新注入的盐分数量与海水里跑掉的盐分数量互相抵消，海水的平均溶盐浓度保持稳定。这表明[ ]

①量变是质变的必要准备

②质变是量变的必然结果

③静止是一种特殊的运动

④物质是运动的物质

A．①②

B．③④

C．②③

D．①④

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

如图所示，图中MN是由负点电荷产生的电场中的一条电场线．一带电粒子+q飞入电场后，只在电场力作用下沿图中虚线运动，a、b是该曲线上的两点，则下列说法正确的是（　　）

A．a点的电场强度小于b点的电场强度

B．a点的电势低于b点的电势

C．粒子在a点的动能小于在b点的动能

D．粒子在a点的电势能小于在b点的电势能

在高速重载传动中，常因啮合区温度升高而引起润滑失效，致使两齿面金属直接接触并相互粘连，当两齿面相对运动时，较软的齿面沿滑动方向被撕下而形成沟纹，这种现象称为齿面胶合。

机械本体为数控机床的主体，是用于完成各种切削加工的（）。

A.动力部分

B.传感部分

C.机械部分

D.控制系统部分