英语四级改错练习题第011组英语四级考试

文章作者 100test 发表时间 2009:07:25 10:22:33
来源 100Test.Com百考试题网

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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，cockroaches and 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 its 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 theres no danger of fire too． 9．__________