资源描述
A healthy life
阅读理解
Below is a selection from a popular science book.
If blood is red, why are veins (静脉) blue?
Actually, veins are not blue at all. They are more of a clear, yellowish color. Although blood looks red when it's outside the body, when it's sitting in a vein near the surface of the skin, it's more of a dark reddish purple color. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison.
Which works harder, your heart or your brain?
That kind of depends on whether you are busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But, in the long run, your brain probably tips it, because even when you’re sitting still your brain is using twice as much energy as your heart, and it takes four to five tunes as much blood to feed it.
Why do teeth fall out, and why don't they grow back in grown-ups?
Baby (or "milk") teeth do not last long; they fall out to make room for bigger, stronger adult teeth later on. Adult teeth fall out when they become damaged, decayed and infected by bacteria. Once this second set of teeth has grown in, you're done. When they're gone, they’re gone. This is because nature figures you're set for life, and what controls regrowth of your teeth switches off.
Do old people shrink as they age?
Yes and do. Many people do get shorter as they age. But, when they do, it isn't because they're shrinking all over. They simply lose height as their spine(脊柱) becomes shorter and more curved due to disuse and the effects, of gravity (重力). Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again? No, because old people don't really shrink! It is not that they are growing backwards 一 their legs, arms and backbones getting shorter. When they do get shorter, it's because the spine has shortened a little. Or, more often, become more bait and curved.
Why does spinning make you dizzy (眩晕的)?
Because your brain gets confused between what you're seeing and what you're feeling. The brain senses that you’re spinning using special gravity-and-motion-sensing organs in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning the system goes out of control, and your brain thinks you're moving while you're Dot!
Where do feelings and emotions come from?
Mostly from an ancient part of the brain called the limbic system. All mammals have this brain area — from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other, newer bits of the brain, we feel more complex emotions than any other animal on the planet.
If exercise wears you out, how can it be good for you?
Because our bodies adapt to everything we do to them. And as far as your body is concerned, it’s "use it, or lost it”! It's not that exercise makes you healthy; it's more that a lack of exercise leaves your body weak and easily affected by disease.
46. What is the color of blood in a vein near the surface of the skin?
A. Blue. B. Light yellow. C. Red. D. Dark reddish purple.
47. Why do some old people look a little shrunken as they age?
A. Because their spine is in active use.
B. Because they are more easily affected by gravity.
C. Because they keep growing backwards.
D. Because their spine becomes more bent.
48. Which of the following statements about our brain is true?
A. In the long run, our brain probably works harder than our heart.
B. When our brain senses the spinning, we will fell dizzy.
C. The brains of the other mammals are as complex as those of humans.
D. Our feelings and emotions come from the most developed area in our brain.
49. What is the main purpose of the selection?
A. To give advice on how to stay healthy.
B. To provide information about our body.
C. To challenge new findings in medical research.
D. To report the latest discoveries in medical science.
完形填空 A Leap（跳动）to Honor
Leaping on a narrow balance beam（平衡木） is not easy. But Lola Walter, a 13-year-old gymnast, is an expert at it.
To perfect her skills, Lola 36 for four hours a day, five days a week. At the state championships in March, she finished seventh out of 16 girls.
That’s especially impressive. 37 she is legally blind, born with a rare condition that causes her eyes to shift constantly. She often sees double and can’t 38 how far away things are.
When she was little, her mom 39 that even though she couldn’t see 40 , she was fearless. So her mom signed her up for gymnastics when she was three. She loved the 41 right away and gymnastics became her favorite.
Though learning gymnastics has been more 42 for her than for some of her tournaments, she has never quit. She doesn’t let her 43 stop her from doing anything that she wants to.
She likes the determination it takes to do the sport. Her biggest 44 is the balance beam. Because she has double vision, she often sees to beams. She must use her sense of touch to help her during her routine. Sometimes she even closes her eyes. “You have to 45 your mind that it’ll take you where you want to go.” says Lola.
To be a top-level gymnast, one must be brave. The beam is probably the most 46 for anyone because it’s four inches wide. At the state competition, Lola didn’t fall 47 the beam. In fact, she got an 8.1 out of 10---- her highest score yet.
Lola doesn’t want to be 48 differently from the other girls on her team. At the competitions, the judges don’t know about her vision 49 . She doesn’t tell them, because she doesn’t think they need to know. Her mom is amazed by her 50 attitude.
Lola never thinks about 51 . She is presently at level 7 while the highest is level 10 in gymnastics. Her 52 is to reach level 9. She says she wants to be a gymnastics coach to pass down what she’s learned to other kids 53 she grew up.
Lola is 54 of all her hard work and success. She says it helped her overcome problems in her life outside gymnastics, too. Her 55 for others is “just believe yourself”.
36. A. runs B. teaches C. trains D. dances
37. A. since B. unless C. after D. though
38. A. tell B. guess C. assume D. predict
39. A. suspected B remembered C. imagined D. noticed
40. A. deeply B. well C. ahead D. closely
41. A. task B. sport C. event D. show
42. A. boring B. enjoyable C. different D. unsatisfactory
43. A. talent B. quality C. nature D. condition
44. A. doubt B. advantage C. challenge D. program
45. A. examine B. express C. open D. trust
46. A. fearful B. harmful C. unfair D. inconvenient
47. A. to B. on C. off D. against
48. A. greeted B. treated C. served D. paid
49. A. pains B. stresses C. injuries D. problems
50. A. positive B. friendly C. flexible D. caution
51. A. defending B. quitting C. winning D. bargaining
52. A. standard B. range C. view D. goal
53. A. until B. as C. when D. before
54. A. proud B. tired C. ashamed D. confident
55. A. plan B. advice C. reward D. responsibility
37．答案A 解析 since表缘由，这个成果令人印象特殊深刻，由于从法律上来说，她是个盲人。
38．答案A 解析 tell“辨别；判定”，文中指Lola Walter不能辨别事物的距离。guess 猜想；推想； assume假设，假定；predict 预言，猜想。
书面表达
假设你班将进行一次英语班会，主题为“中同学应当如何使用家长给的零花钱”。请你依据提示写一篇发言稿。
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1. 词数：100左右；2. 参考词汇：零花钱—pocket money
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