问题补充：
In February , Lydia Angyiou and her two sons were walking through their village in northern Canada. The sound of children shouting made her turn around. To her horror, Lydia saw a 700-pound polar bear behind her eyeing her seven-year-old son. Getting between the bear and her child, Lydia yelled at the children to run away. She then began hitting and kicking the animal as hard as she could. A neighbor who heard all the noise came and shot the bear. But everyone agreed it was Lydia who had saved her children’s lives. A local policeman described it this way: “… I guess when your back is up against the wall, … we come up with super-human strength.”
Where does this “super-human strength”, courage and quick thinking come from? Experts say it comes from stress! In stressful situations, the body releases chemicals that prepare it to take action. These chemicals give people the speed and strength they need to fight danger or run away from it.
When we think of stress, we usually think of its negative effects. Studies, though, show that moderate levels of stress are actually helpful. In fact, the way we perform is usually affected by the amount of stress we feel.
Stress causes the brain to release adrenaline(肾上腺素) which in turn increases our energy and excitement. The chemical gives us clearer minds and helps us to do more. This is why some people say they work better under a deadline.
Adrenaline that is not released for long periods of time can cause us to increase and strengthen our abilities instead of weakening them. We sometimes turn out our very best work when we push ourselves to the limit. Stress can also make us more confident. Handling small amounts of stress now prepares us for handling serious situations in the future. Who knows? Today’s stress may even prepare for the next polar bear that comes along!
【小题1】In the first paragraph, the case of Lydia Angyiou is mentioned to.A．introduce the topic to be followedB．remind us of the unexpected danger of lifeC．praise Lydia Angyiou for her braveryD．show the importance of super-human strength【小题2】What does the policeman probably mean by saying “your back is up against the wall”?A．You are helped.B．You are inspired.C． You are confident.D．You are cornered.【小题3】What would be the best title for the passage?A．Brave MotherB．The Cause of StressC．The Benefit of StressD．Super-human StrengthA
答案：
(答案→)A
解析：
【小题1】过第一段介绍Lydia Angyiou救她的孩子引出下文有压力才有超人一样的力量。所以选A。为了引出下文的中心论点。
【小题2】cornered意思是被逼至绝路的，inspired是有创造力的，confident是有信心的。只有D符合题意。
【小题3】全文是通过介绍Lydia Angyiou在危机时刻救孩子逼出的力量引出在压力下能爆发出更大的力量。进而引出压力的益处。
