Word came from California of a new weapon in the war on household pests.Two scientists work for a firm in California developed 1.__________

  a new method to eliminate insects with using dangerous chemicals.The new 2.__________

  weapon—hot air.The basic idea is that insect pests can adjust to temperature much above 3.__________

  normal.In laboratory experiments, termites can't survive much more than a quarter of hour at 100 degrees 4.__________

  Fahrenheit or about fifty degrees centigrade. The new method involves covering a house with a huge tent,and fill it with air heated to 5.__________

  around 65 degrees centigrade.Hot air is forced in with fans and the tent keeps the heat inside the house.Although termites try to escape by 6.__________

  hiding in wood beams,the heat treatment must be continued by four to six hours.But when it's 7.__________

  all over and the insects are dead, there are no toxic residues to danger humans or pets,and no 8.__________

  funny smells.Scientists claim that there's no danger of fire too. 9.__________

  Since very few household materials will burn at 65 degrees centigrade.In fact,wood is prepared for by drying in the ovens at 100 degrees centigrade,that is substantially hotter. 10.__________

  【答案请见下页】

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