英语论文网

catches fire and burns
　　B. the underground oxygen will be used up
　　C. poisonous fumes and greenhouse gases will be accumulated underground
　　D. there will be an increases of abandoned mines
　　3 What did Stracher analyze in his article published in the International Journal of Coal Ecology?
　　A. annual consumption of coal in U.S.
　　B. annual consumption of coal in China
　　C. how long coal fires has lasted in the northern region of China
　　D. coal fires can have an impact on the environment
　　4 Which of the following statements about Paul Van Dijk is Not true?
　　A. he was one of the scientists who have warned against the threats of underground fires
　　B. he has detected and monitored underground fires in Netherlands
　　C. he has worked with the Chinese government on the underground fires issue.
　　D. He works for a research institute in Netherlands.
　　5 According to the fifth paragraph, what is the suggested method to control underground fires?
　　A. using remote sensing techniques
　　B. controlling the release of carbon dioxide
　　C. making the soil heat resistant
　　D. cutting off the oxygen supply
　　标准答案： C,A,D,B,D
　　解析：
　　23、
　　阅读下面的短文，文章中有5处空白，文章后有6组文字，请根据文章的内容选择5组文字，将其分别放会文章原有位置，以恢复文章原貌。请将答案涂在答题卡相应的位置。
　　High Dive
　　Cheryl Stems aims to go boldly where no human has ever gone before in a balloon：40 kilometers up into the atmosphere. 1 .No one has ever leapt from such a height or gone supersonic without an airplane or a spacecraft.Yet Stems，an airline pilot，is not the only person who wants to be the first to accomplish those feats.Two other brave people，an Australian man and a Frenchman，are also planning to make similar leaps.
　　2 .First，she’ll climb into a cabin hanging from a balloon the size of a football field.Then the balloon will take her high into the stratosphere—the layer of Earth’s atmosphere 12 to 50 kilometers above the planet.“The ascent will take two and a half to three hours.” said Stems.”I’ll be wearing a fully pressurized，temperature-controlled space suit.’’
　　At 40 kilometers。Stems will be able to see the gentle curve of Earth and the blackness of space over head.Then she’11 unclip herself from the cabin and dive headfirst，like a bullet，into the atmosphere. 3 .
　　For high dive，astronaut escape suits are a key to success.Current pilot and astronaut escape suits are guaranteed only a maximum altitude of 21 kilometers.Del Rosso，a NASA engineer of spacesuits and life—support systems，said the suit designed for Stern’s jump could serve as a model for the lethal environment of higher climbs. 4 .The first hazard is oxygen-deficient air.Any person without an additional oxygen supply at 40 kilometers would die within three to five seconds.The second hazard is low atmospheric pressure.Atmospheric pressure is much lower at high altitudes than it is at sea level.The low atmospheric pressure of the upper stratosphere causes the gases in body fluids to fizz out of solution like soda bubbles. 5 .Other hazards include temperatures as low as-55 degrees Celsius，flying debris，and solar radiation.
　　For Sterns to survive，her spacesuit will have to protect her from all of these hazards.“A spacesuit is like a one-person spaceship。”Del Rosso explained.“You have to take everything you need in a package that’s light enough，mobile enough，and tough enough to do the job.You Can’t exist without it.”
　　练习：
　　A. It will handle severa