People often speak of fire as though it
were a living creature--It grows, dances, needs oxygen, feeds on whatever it can
find, and then dies. And when a forest fire rages out of control, threatening
human lives and homes, it must be fought like a "wild animal." The fight is
often desperate, since firefighters’ best efforts may be dwarfed by the fury of
a large fire. But the fire’s own traits can be used against it. The heated air above a fire rises in a pillar of smoke and burnt gases, pulling fresh air in from the sides to replace it. Firefighters use this fact when they "fight fire with fire." They start a fire well in front of the one which they are fighting. Instead of traveling on in front of the huge fire, the smaller fire is pulled back toward it by the updrafts of the larger blaze. As it travels back to meet the large A. how fires start B. damage caused by fire C. the fascination of fire D. fighting forest fires [单项选择]Spanish people usually speak ( ) than English people.
A. quick B. more quick C. more quickly D. quicken [填空题]In which countries should people not speak with hands in pockets
In __________. [单项选择]( ) people can speak a foreign language perfectly.
A. Not much B. Little C. Only a small number D. Few [单项选择]
People often speak of fire as though it were a living creature--It grows, dances, needs oxygen, feeds on whatever it can find, and then dies. And when a forest fire rages out of control, threatening human lives and homes, it must be fought like a "wild animal." The fight is often desperate, since firefighters’ best efforts may be dwarfed by the fury of a large fire. But the fire’s own traits can be used against it. 我来回答: 提交
|