更多"People often speak of fire as thoug"的相关试题:
[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.
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 fire, the smaller backfire burns away the fuel that the forest fire needs to survive.
Even when a backfire has been well set, however, the fire may stil
A. can be blown around by the wind
B. dwarfs man’s best efforts
C. heats the air above it
D. may still win the struggle
[单项选择]
Passage Three
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]
How often one hears children wishing they were grown-ups and old people wishing they were young again. Each age has its pleasures and its pains, and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets.
Childhood is a time when there are few responsibilities (责任) to make life difficult. If a child has good parents, he is fed, looked after and loved, whatever he may do. It is impossible that he will ever a gain in his life be given so much without having to do anything in re turn. What’s more, life is always giving new things to the child things that have lost their interest for older people because they are too well-known. But a child has his pains: he is not so free to do what he wishes to do; he is repeatedly (反复地) being told not to do some thing, or being punished for what he has wrongly done.
When a young man starts to earn his own living, he can no longer expect others to pay for his food, A. only children are interested in life B. a child is always loved whatever he does C. life for a child is fairly easy D. if much is given to a child, he must do something in return
[单项选择]How many people were caught in the fire A. 6 B. 5 C. 4 D. 7
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