题目

阅读理解     Morten Petersen used to live in a windowless basement flat in Copenhagen.  If he didn't get out in the daytime, he would lose track of time and start becoming annoyed and depressed. "When you are living in a basement with only artificial light, it becomes very clear that something is lacking,'' he says. "It's an emotional,physical and mental thing all combined. "     You can say that again. Our lifestyles have rapidly changed with light. Prior to the invention of gas lighting at the turn of the 19th century, the only artificial light we could rely on was from flickering firelight, candles or whale-oil lamps. People also spent many more of their waking hours outside. Over time,the technology of artificial light has been advancing,thus changing the way people live and work.     Today, the average westerner spends 90 per cent of their life indoors. That means we are getting less light during the day and being exposed to more light at night. This pattern is increasingly being linked to disturbed sleep and circadian rhythms — 24-hour changes in our biology and behavior — with consequences for our physical and mental health. Meanwhile, getting too little sunlight is contributing to vitamin D shortage and may be weakening our immune and cardiovascular systems as well.     Our changed relationship with the sun is greatly affecting our biology .That's why people like Petersen are being taken in by researchers to help investigate how much damage we do by shying away from the light, and just how much light we need. The good news is that researchers are finding even small increases in your exposure to bright light will bring about great changes to your health. （1） Why is Morten Petersen mentioned in paragraph 1? A . To explain a reason. B . To state an opinion. C . To introduce the topic. D . To offer background information. （2） What is mainly discussed in paragraph 2? A . People's outdoor activities. B . Relationship between people. C . The origin of gas lighting. D . The influence of light. （3） What is the consequence of too much exposure to indoor light? A . A small increase in vitamin D. B . Physical and mental disorders. C . More time spent outdoors. D . More quality sleep. （4） What is the best title for the text? A . Come out for more sunlight! B . Never live in a basement! C . Lifestyles have changed greatly. D . Artificial light makes a difference. 答案： C D B A

查看本题答案和解析