题目

阅读理解 Heat stress from extreme heat and humidity (湿度) will annually affect areas that are now home to 1.2 billion people by 2100, assuming current greenhouse gas emissions (排放), according to a Rutgers study. Most climate studies on projected heat stress have focused too much on extreme heat but did not consider the role of humidity, which is another key driver. "When we look at the risks of a warmer planet, we need to pay particular attention to the combined effects of extreme heat and humidity, which are especially dangerous to human health." said Robert E. Kopp, director of the Rutgers Institute of Earth, Ocean, and Atmospheric Sciences. Rising global temperatures are increasing exposure to heat stress, which harms human health. Heat stress is caused by the body's inability to cool down properly through sweating. Body temperature can rise rapidly, and high temperatures may damage the brain and other vital organs. What's more, heat stress can result in heatstroke (中暑), which is the most serious heat-related illness, can kill or cause permanent disability without emergency treatment. Annual exposure to extreme heat and humidity above safety guidelines will be projected to affect areas that are currently home to about 500 million people, if the planet warms by 1.5℃ and nearly 800 million at 2℃. The planet has already warmed by about 1.2℃ above late 19th century levels. An estimated 1.2 billion people would be affected with 3℃ of warming, as expected by the end of this century under current global policies. That's nearly four times the number of people affected today, and nearly 12 times the number who were affected in no industrial age. （1） What can we infer from the first two paragraphs? A . Many areas will be flooded by the end of 2100. B . Exposure to polluted air may cause cancer. C . Less attention has been paid to the effect of humidity. D . Heat stress makes it harder to forecast the weather. （2） What's the harm of high body temperature? A . Sweating a lot. B . Damaging organs. C . Causing heart-attack. D . Leading to high blood pressure. （3） How many people are affected by heat stress nowadays? A . About 800 million. B . About 500 million. C . About 1.2 billion. D . About 300 million. （4） Which of the following is the best title for the text? A . How to prevent heat stress B . Heat stress may affect more people C . The combination of heat and humidity D . The earth may get warmer and warmer 答案： C B D B

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