题型:阅读理解 题类:常考题 难易度:普通
安徽省淮北市第一中学2017-2018学年高二上册英语期中考试试卷
Scientists have found that human eyes are more likely to be damaged by UV rays (紫外线) while skiing in the snow-covered areas than sitting on the beach, according to a report by the UK newspaper The Telegraph.
The researchers at Kanazawa Medical University, Japan and American company Johnson conducted the study together. They looked at the effects of light reflection on newly fallen snow on a ski trail (a rough path) in Ishikawa District, northern Japan. They compared the results with the levels of UV rays on a sand beach in southern Japan's Okinawa District They found that on the beach, eyes are exposed to a daily 260 kilojoules (千焦耳) of UV a square meter compared to 658 kilojoules in snow-covered areas. The findings are supported by the Japan Meteorological Agency. According to the agency, the reflection rate of UV light on beaches is often between 10 and 25 percent, compared to 80 percent in lie new snow areas. The amount of light increased 4 percent with a 300-meter rise in height.
Most of us know that UV rays can harm the skin. That's why we wear sunscreen on our skin before we get out in the suit. But many of us may not realize that UV rays are also harmful to the eyes.
If your eyes are exposed to large amounts of UV radiation over a short period of time. You may experience a kind of sunburn of the eye, which is harmful. Your eyes will become red and feel a strange feeling. They may be sensitive to light. Fortunately, this is usually temporary and seldom causes permanent damage to the eyes.
Long-term exposure to UV radiation, however, can be more serious. Scientific studies and researches have shown that exposure to small amounts of UV radiation over a period of many years increases chance of eye damage, which could lead to total blindness.
Passenger Information
Carry-on Bag Rules
When travelling on China Southern planes, we ask our customers to follow our simple bag rules.
Each passenger is allowed to bring one bag onto the plane.
Weight limit: Each carry-on bag may weigh up to 10 kilos.
Size limit: Each carry-on bag can be up to 110cm long, 60cm high and 30cm wide.
Additional bags and oversized/overweight bags may be allowed on the plane if there is enough room. There will be a fee for such bags (see the table below). Please note that if your bag breaks more than one rule then you must pay a fee for each rule broken.
Safety Rules
For the safety of our passengers, the following items must not be taken onto the plane:
Bottles containing gas (e.g. cigarette lighter)
Bottles containing any cream, oil or other liquid that are over 100ml.
Note:
If you have any liquid medicines over 100ml that you must use during your flight, please contact our customer service manager on 34533566 to make arrangements at least 24 hours before your departure. You will need to have a doctor's letter explaining why you need the medicine.
Bag Fees
Rule |
Fee |
|
Overweight* |
Bags heavier than 10 kilos |
¥100 per kilo over limit |
Oversized** |
Bags larger than 110cm*60cm*30cm |
¥250 per bag |
Extra bags |
¥400 per extra bag |
No bag over 15 kilos will be allowed on the plane. **No bag over 150cm long or 80cm high may be taken on the plane. Passengers must put such bags in the plane's storage.
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