高三英語The Violence of Nature教案

答案：caused him to
2.這座大壩3, 830米長。(in length)
the dam is 3,830________ ________ ________.
答案：metres in length 3.樹吸收二氧化碳放出氧氣。(take in)
trees________ ________carbon dioxide and give out oxygen.
答案：take in
4.china is situated in one of the most active earthquake regions in the world and there have been many terrible earthquakes.
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答案：中國位于世界上最活躍的地震帶之一，這里一直有很多后果可怕的地震。 5.we are all in the position of the farmer. if we plant a good seed, we get a good harvest. if our seed is poor and the field is full of weeds, we harvest a useless crop. if we plant nothing at all, we harvest nothing at all.
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答案：我們每個人都像是農夫。撒下良種將有豐收；播下劣種或任由田地生滿野草將毀去收成；沒有耕耘將會一無所獲。 ⅳ.閱讀理解
flu is a common infection of the nose and throat, and sometimes the lungs. the cause is a virus that passes from one person to another. the virus spreads through the air when an infected person expels air suddenly.
  flu develops after the virus enters a person's nose or mouth. the flu causes muscle pain, sudden high body temperature, breathing problems and weakness. generally, most people feel better after a week or two. but the flu can kill. it is especially dangerous to the very young, the very old and those with weakened defenses against disease. medical experts have recognized for some time that people become infected with flu during the winter months. but they did not really know why until recently.
american researchers say they now know why the flu virus spreads in the winter and not in the summer. they say it is because the virus remains in the air longer when the air is cold and dry. researchers in new york carried out twenty experiments with guinea pigs to investigate how the virus spreads. the researchers found the virus spread the most when the temperature was about five degrees celsius and the humidity was twenty percent. few of the guinea pigs developed flu as the temperature increased.  the virus stopped spreading completely at thirty degrees celsius and eighty percent humidity. the researchers also found that the animals spread the virus among themselves nearly two days longer when the temperature was low. one of the researchers said the study shows that flu virus is more likely to infect people during an outdoor walk on a cold day than in a warm room. he said cold air helps the virus survive in the air and low humidity helps it stay there longer. that is because particles of the virus ride on the extremely small drops of water floating in the air. when the air is very humid, water droplets fall to the ground more quickly. the researchers say, however, that people should not stay in warm places all the time in cold weather to avoid the flu. they say the best way to prevent the sickness is to get yearly injections of a vaccine that prevents flu. 1. from the passage we can conclude that ________.