BrainPowerYoucarryaroundathree-poundmassofwrinklymateri...

問題詳情：

Brain Power

You carry around a three-pound mass of wrinkly material in your head that controls every single thing you will ever do. From enabling you to think, learn, create, and feel emotions to __51__ every breath, and heartbeat—this fantastic control center is your brain. It is a structure so __52__ that a famous scientist once called it "the most complex thing we have yet discovered in our __53__."

Your brain is faster and more___54___ than a supercomputer. Your kitten is on the kitchen counter. She's about to step onto a hot stove. You have only seconds to act. Assessing the signals coming from your eyes, your brain __55__ calculates when, where, and at what speed you will need to dive to stop her. Then it orders your muscles to do so. Your timing is perfect and she's __56__. No computer can come close to your brain's magic ability to download, process, and __57__ the flood of information coming from your eyes, ears, and other organs.

Your brain changes when you learn. Riding a bike seems __58__ at first. But soon you master it. How? As you practice, your brain sends "bike riding" messages over and over, forming new connections. In fact, the __59__ of your brain changes every time you learn, as well as whenever you have a new __60__ or memory.

Exercise helps make you___61___. It is well known that any exercise that makes your heart beat faster, like running or playing basketball, is great for your body and can even help __62__ your mood. Scientists have recently found that for a period of time after you've exercised, your body__63__ a chemical that makes your brain quicker to learn. __64__ if you're stuck on a homework problem, go out and play a game of soccer, then try the problem again. You just might discover that you're able to __65__ it.

51. A. consuming             B. holding                C. controlling            D. distributing

52. A. annoying               B. amazing              C. horrifying             D. amusing

53. A. brain                           B. continent              C. laboratory           D. universe

54. A. powerful                     B. profitable          C. potential         D. positive

55. A. slowly                  B. essentially                     C. quickly              D. additionally

56. A. proud                  B. safe                  C. burned                     D. dangerous

57. A. react to                   B. refer to                        C. send out                   D. search for

58. A. acceptable                    B. enjoyable             C. impossible          D. convenient

59. A. responsibility         B. structure                      C. nature              D. quality

60. A. invention                    B. position                C. idea                          D. result

61. A. slimmer                     B. stronger                   C. smarter             D. healthier

62. A. describe               B. affect                  C. approve               D. improve

63. A. lacks                           B. produces                   C. needs             D. resists

64. A. So                  B. But                 C. Or                    D. Yet

65. A. puzzle               B. operate             C. promote              D. settle

【回答】

CBDAC  BACBC   CDBAD

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