题目内容
B. reasonable
C. equal
D. proper
You may picture firefighters holding a hose (水管) outside of a burning building,but the Golden Eagles Hotshots don't fight fires quite that way.When they go into action,you may not even see a fire truck.
The Hotshots are firefighters who battle fires in wilderness areas.But don't think you'll only find them in California.Wherever there is a national wildfire emergency,the Golden Eagles Hotshots could be there.
But these firefighters don't work the same way as those in big cities.They work where there are large numbers of trees,bushes,and grass.They climb up and down steep hills to clear brush and burnable debris (残骸).They sometimes use water,but often fight fire with fire!
They do that by lighting what are called “backfires” ---- small,controlled fires that burn up fuel in the path of larger wildfires.That way, when the wildfire gets there, it has nothing to burn and nowhere to go,because all the burnable fuel has already gone up in smoke.
The Hotshots also clear away fuel using old-fashioned hard work.For example,they use a saw to cut away trees and heavy brush that could catch fire.
Of course there are times when the Golden Eagles Hotshots do have trucks to supply water to the fires.But the water is limited,and these guys have to rely on hard work more than anything.Physical fitness is very important.They have to be strong to handle steep hills while carrying a 60pound pack.
Thanks to their efforts,many lives have been saved,many houses not burned,and countless trees still standing.
【小题1】According to the passage,why do the firefighters light “backfires”?
A.To signal for help. | B.To remove obstacles. |
C.To protect trees and bushes. | D.To prevent the fire from spreading. |
A.They are firefighters working in big cities. |
B.Their work requires physical strength. |
C.They are working for free. |
D.They usually hold a hose to put out the fires. |
A.areas | B.ways | C.achievements | D.tools |
A.Appreciative. | B.Doubtful. | C.Worried. | D.Critical. |
Some people say that the best way to reduce the size of your waist is to do stomach exercise. Many people believe that when specific muscles are exercised, the fatty tissues (组织) in the immediate area are burned up. The truth is that exercise burns fat from all over the body and not from one specific area. Of course, if you reduce the fat throughout your body, you will certainly see results around your waist too.
Some people believe that you need to exercise twice a week in order to keep a sufficient level of physical fitness. However, studies directed by American scientists show that unexercised muscles lose their strength very quickly. Within 48 to 72 hours, you must use the muscles again to reestablish (重建) the good physical effects. And what does that mean to you? American scientists concluded that while daily exercise is most helpful, exercising every other day or three days a week will keep a sufficient level of physical fitness.
Is it true that you burn more calories running one mile than walking the same distance? The answer is no. The truth is that you use the same amount of energy whether you walk or run the mile, since in both cases you are moving the same weight the same distance. The speed does not matter. Of course, if you run rather than walk for 30 minutes, you will cover more distance, and therefore burn more calories.
If your breathing doesn’t return to normal within 5 minutes after you finish exercising, you have exercised too much. Five minutes or so after exercising, your breathing should be normal, your heart shouldn’t be beating loudly, and you shouldn’t be tired.
1.If you want to reduce the fat around your waist, you should ____.
A.do stomach exercise |
B.exercise the waist |
C.exercise all the muscles of your body |
D.run fast for 30 minutes |
2.From the second paragraph, we learn that ____.
A.we only need to exercise twice a week |
B.we should exercise three times a week |
C.muscles lose their strength after 48 hours |
D.we should exercise every other day, or three days a week |
3.It can be inferred from the third paragraph that _________ .
A.you will lose more weight running one hour than walking one hour |
B.whether you run one mile or walk the same distance, you use the same amount of energy |
C.you will lose more weight running one mile than walking the same distance |
D.both A and B |
4.If you have exercised too much, _______.
A.your breathing will take longer than 5 minutes to return to normal after you finish exercising |
B.your breathing will return to normal within 5 minutes after finishing exercising |
C.your heart will not be beating loudly |
D.you will be too tired to move |
5.This passage tells us that _________.
A.it is better to do more running than walking |
B.the more exercise you do, the healthier you will be |
C.the unexercised muscles must be used again within 48 to 72 hours |
D.in order to lose weight, you have to run fast |