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问题 单项选择题

由下列哪一种土构成的土坡进行稳定性分析时一般采用条分法（）？

A.粗砂土

B.碎石土

C.细砂土

D.粘性土

答案

参考答案：D

解析：粘性土由于剪切破坏的滑动面大多数为一曲面，理论分析时近似地假设为圆弧面，为便于计算，采用条分法。

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                                       Answering the Community Needs of Our City

     The Silver City Council recognizes that citizens have certain needs. To better meet your needs, we

have made several changes to community facilities in 2004. This chart shows how we have tried to make

your life better.

     Transport

     Three stations for the suburbs have been added to the western train service. 20 new buses for the

southern line were purchased in January. 50 per cent of city bus-stops have been upgraded. Buses to the

eastern suburbs will be every 15 minutes.

     Communication

     Broadband cable is now available to all parts of the city. All of the new Government buildings are

' smart'-wired for better computer service!

      Medical Facilities

     The new state-of-the-art Nightingale Hospital was opened in June. To overcome a shortage of trained

medical staff at Dover Hospital, 10 doctors have been employed from overseas. Some facilities at Station

Street Hospital have been upgraded.

     Education

     Textbooks will be free to all primary students in 2004! Rental for private schools has been reduced.

Teachers report that the 'no hat - no play' rule has been successful.

      Protection and Security

     Extra police now patrol (巡逻 ) the tourist areas. 50 new police officers graduated in July and have

taken up duties in the city area.

     Entertainment / Recreation

     The John Street basketball courts have been re-surfaced! The new Central Community Building opened

in May. 5,000 new fiction books were bought for the Silver City Library.

1. The public notice is from _____.

A. the community

B. the local government

C. the citizens

D. a travel agency

2. The notice is mainly about _____.

A. the work carried out by the people of Silver City

B. the facilities available in Silver City

C. some improvements in Silver City

D. information for interested tourists

3. All the following are true EXCEPT that _____.

A. both residents and tourists can enjoy more security now

B. Station Street Hospital had out-dated facilities before 2004

C. primary students had to pay for their textbooks in 2003

D. Dover Hospital is still short of trained medical staff

4. Which of the following changes would tourists to Silver City be most happy with?

A. Travel books are provided in the new library.

B. Traveling by train is more convenient in Silver City.

C. Free medical treatment is available at Station Street Hospital.

D. There are more police officers on duty now.

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    Many do-it-yourself homeowners are interested in
trying out solar power to learn about the technology
and perhaps to provide energy for limited-use applications.
There are a variety of ways to find cheap solar panels
(板), including buying used and building your own with
factory seconds. Both methods will save money while
forcing you to learn the ins-and-outs of a solar power
array (阵列). 
    We've all seen solar-powered street signs or PV
panels being used for various purposes at remote
locations. When those units become cracked or chipped
and- are considered "unsafe", companies are forced to
replace them, generally to avoid responsibility issues.
Because it's difficult to get rid of PV panels, many
companies, if approached, are willing to give them away or to sell them for modest prices. Depending on the
degree of damage present, expect to see performance degradation (降级) in the range of 10% to 60%. A
multimeter (万用表) can be used to test the panel before buying. If the panel's free, take it anyway. It could
still be useful in a home solar project.
     A solar panel is really nothing but a box serving as a container for a large group of solar cells. Factory
second solar cells are usually sold on eBay at a small part of their regular cost. The cells come in a variety of
sizes. You will need to figure out how much power a single cell produces to determine how many will need to
be wired together to form an array.
     A simple search of the Internet will show numerous sites detailing home solar panel projects. Do-it-yourself
lovers are generally quite generous in supply photographs of their work and description of what went wrong
and right with the project.
     Getting cheap solar panels with slight imperfections either used or through sales of factory seconds, is a
perfect solution for home-built renewable energy projects. The high number of solar lovers online provide a
wealth of useful information. Only limited skills are required, plus an understanding of the basic wiring involved.
All are well within the talents of almost any home handyman. Beyond the satisfaction of having completed the
project, you'll come away with a functional solar panel that will be a source of power for use around the house
or at remote locations.
     Solar energy systems are quickly becoming more popular with homeowners as prices continue to decline.
1. The author writes the passage to introduce _____.
[ ]
A. ways of finding cheap solar panels
B. ways of saving energy
C. a way of making a solar panel
D. a home-built energy system
2. What does the phrase "factory seconds" in the passage refer to?
[ ]
A. Second-hand factory products.
B. Cheap but perfect factory products.
C. Faulty factory solar cells.
D. The second best factory solar cells.
3. From Paragraph 5, we can learn about home-built energy projects that _____.
[ ]
A. none of them are beyond home handymen
B. a lot of useful information is available on the Internet
C. a perfect solution is to get cheap and perfect solar panels
D. understanding electrical wiring is not necessarily needed
4. What is the author's attitude towards the future of solar energy systems?
[ ]
A. Optimistic. 
B. Pessimistic.
C. Indifferent.
D. Doubtful.
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