题型:阅读理解 题类:模拟题 难易度:普通
黑龙江省齐齐哈尔市2018届高三英语第二次模拟考试试卷
Kids seem to spend endless hours on smartphones, computers and tablets these days. The best thing parents can do to prevent it is to encourage youngsters to spend more time outdoors in the sunlight.
There has been a massive rise around the globe in short-sightedness—or myopia as it's officially known—over recent decades. Myopia or short-sightedness is becoming more common. Lack of natural light seems to be the key issue. “The main factor seems to be a lack of exposure to direct sunlight, because children who study a lot and who use computers or smartphones or tablet computers a lot have less opportunity to run around outside and are less exposed to sunshine and because of that children seem to be at more risk of developing shortsightedness.”
Professor Hammond says, “It may be there's no coincidence that in East Asian countries, the most myopic ones all relate may to be the that maths league tables(排名表). These kids are being pushed with very intensive education from a very young age and spend a lot of time indoors studying close up. Therefore the concern is that all close work—like playing with the iPhone—carries the potential that it could make them more shortsighted.”
The best thing to do, say the experts, is to get children playing outside as much as possible. “In a perfect world, probably on average across the week and the weekend, two hours a day outdoors is protective of becoming short-sighted in children. Healthy diet is really also important—in terms of getting oily fish, green vegetables, green leafy vegetables as much as possible.
“What we need to look at is ways of modifying the impact that these activities have on their visual development.” Professor Hammond said, “There are eye drops and other treatments to slow myopia progression. But in terms of preventing myopia itself, there isn't any data out there at the moment in terms of the question, 'Could the drops we use slow progression or stop myopia developing at all? ' ”
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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