潇湘馆的环境与林黛玉的性格有着怎样的关联？

读图，某经线上有一点M，虚线为过M点地面垂直线，L₁、L₂分别是二至日正午太阳光线。当角α、β之差小于6°时，M点的纬度范围是

A．3°N~3°S

B．6°N~17．5°N

C．3°N~17．5°N或3 °S～17．5°S

D．17．5°S~23．5°S或17．5°N~23．5°N

下列选项中，不属于条码识别技术特点的是（）。

A.使用成本高

B.可靠性高

C.设备结构简单

D.灵活、实用

请对“承保条件为平安险附加战争险，适用PICC1/1/81条款，责任起讫为仓至仓”进行英文表述。

在尽头线上调车时，距线路终端应该有（）米的安全距离。

A、10

B、20

C、30

D、50

阅读理解。

     As the population of the planet increases, so does the number of homes, businesses, parking lots, schools,

airports and roadways. All these structures use electricity and need to be lighted. Humans demand these lights.

They want their homes more comfortable and they want their streets sage. The problem is that researchers are

finding that all the light is having a negative effect on humans and wildlife as well.

     Less than 10 years ago I drove to a thinly populated section of my town, lay down in the middle of the road

and watched an attracted meteor shower (流星雨). The area was short of homes, street lights and traffic. If I

did that today, I wouldn't be able to see the meteor shower as well, and I would surely be run over by a car.

     Nowadays scientists are finding light pollution can be almost as bad as carbon dioxide pollution. If you've

ever taken a flight at night, the view is beautiful, but you must remember that all the light you see is wasted

electricity. The crew of the space shuttles see an even bigger picture of how extensive the wasted electricity

is worldwide.

      Additionally, electricity needs to be generated, and the generation of electricity creates pollution by giving

off greenhouse gases. This affects the air we breathe and our quality of life.

     Scientists are also studying the effects of light pollution on wildlife. Thousands of birds die each year when

they crash into highly lighted buildings, as they become puzzled by the light. It has been long known that tiny

sea turtle hatchlings become lost and follow lights on the shore instead of heading towards the sea.

     Fortunately, light pollution is one of the easiest sources of pollution that can be corrected without a negative

effect. Following some guidelines and a little searching on Google can give you many ideas on how to reduce

your contribution to light pollution.

1. The author tells the story in the second paragraph mainly to _____.

A. remember the past beauty of the town.

B. stress the advantages of less pollution

C. show the great changes of the town

D. prove the bad effects of light pollution

2. In the passage the author advises people ______.

A. to try to reduce unnecessary light.

B. not to ignore the beauty around.

C. to set proper light for animals

D. not to destroy the animal's living conditions.

3. What can be inferred from the passage?

A. Light pollution is difficult to deal with.

B. Light pollution is a threat to some animals.

C. Light pollution has nothing to do with global warming

D. Astronauts can't see clearly in space due to light pollution.

4. What is most likely to be discussed in the paragraph which follows the last paragraph?

A. The author's contribution to light pollution

B. Other sources of light pollution

C. Ways of reducing light pollution

D. More bad effects of light pollution