学科课程的主要特点及优缺点有哪些？

斜坡堤抛砂施工应分段，砂垫层抛填后应及时用块石等覆盖。分段的长度应根据（）确定。

A.自然条件

B.气候条件

C.水流条件

D.施工条件

E.供料情况

葡萄球菌肺炎的临床表现是（）

A.寒战，高热，胸痛，咳嗽，咯铁锈色痰

B.早期可出现肺实变体征

C.低热，盗汗，病程长

D.高热，咳嗽，脓性痰

E.咯粉红色泡沫痰

企业所拥有的资产，从财产权利的归属来看，一部分属于投资者，另一部分则属于( )。

A．企业法人
B．企业职工
C．债权人
D．国家财政

Directions: The following people are expressing their thoughts (1-5) to show their concern for food,

environment and so on. After that are pieces of related information (A-F). Now decide which piece of

information would be most suitable for the thought and idea mentioned in questions 1-5 and mark your

answer letter (A-F) on your answer sheet. There is one extra paragraph which you do not need to use.

______ 1. How I was struck by the clear water and fresh air in my childhood! But everything has changed,

that is, the clear water and fresh air are nowhere to be found again as they were. Above all, a great deal of

waste hardly rots away.

______ 2. More and more people are beginning to have a good knowledge of the importance of a safer and

cleaner environment, which in turn forces the business to be cleaned up.

______ 3. Organic products are getting more and more popular among people, but we should know the fact

that organic products might also have something to do with pesticides (农药).

______ 4. I'm very much fond of growing some vegetables of my own in my small garden, for many

vegetables on sale in markets are actually becoming more and more dangerous as a result of widespread

pesticides.

______ 5. Nowadays it is very convenient for consumers to find and buy green food in supermarkets as they

are clearly marked.

A. "Organic produce is always better," Gold said. "The food is free of pesticides, and you are generally

supporting family farms instead of large farms. And more often than not it is locally grown and seasonal, so

it is more tasty." Gold is one of a growing number of shoppers buying into the organic trend, and supermarkets

across Britain are counting on more like him as they grow their organic food business.

B. Market research shows that Gold and others who buy organic food can generally give clear reasons for

their preferences - but their knowledge of organic food is far from complete. For example, small amounts of

pesticides can be used on organic products. And about three quarters of organic food in Britain is not local

but imported to meet growing demand. "The demand for organic food is increasing by about one third every

year, so it is a very fast-growing market," said Sue Flock, a specialist in this line of business.

C. Many cities around the world today are heavily polluted. Careless methods of production and lack of

consumer demand for environment-friendly products have contributed to the pollution problem. One result is

that millions of tons of glass, paper, plastic, and metal containers are produced, and these are difficult to get

rid of.

D. However, today, more and more consumers are choosing "green" and demanding that the products they

buy should be safe for the environment. Before they buy a product, they ask questions like these:"Will this

shampoo damage the environment?" "Can this metal container be reused or can it only be used once?"

E. Only a few years ago, it was impossible to find green products in supermarkets, but now there are hundreds.

Some supermarket products carry labels (标签) to show that the product is green. Some companies have

made the manufacturing (制造) of clean and safe products their main selling point and emphasize it in their

advertising.

F. The concern for a safer and cleaner environment is making companies rethink how they do business. No

longer will the public accept the old attitude of "Buy it, use it, throw it away, and forget it." The public

pressure is on, and gradually business is cleaning up its act.

对怀疑论的批评主要针对的是怀疑论的论证。