Question

Are you left-handed? If you are, you make up just 10% of the world’s population.小題1:  Most people write and play musical instruments with their right hands.
Why are so few people left-handed? A new theory, called “cooperation (合作) vs competition” may have the answer.小題2:    When making tools for a right-handed person — like a knife — it was easier if everybody could use the same hand. But some humans wanted to compete instead. So to have an advantage over right-handed people, they would use their left hand to surprise competitors.
小題3:German born American scientist Albert Einstein, British physicist Isaac Newton and British biologist Charles Darwin are some famous “l(fā)efties”. At least six US presidents were left-handed, including Barack Obama, Bill Clinton, and Harry Truman.
“Lefties” are also often linked with creativity and visual (視覺) skills.
How can this be? Well, the left side of our brain is where we solve problems. The right side of our brain is where we develop creativity. Right-handers tend (傾向) to use the left side more than the right side.小題4:
“This is why there are more of them in creative areas, such as music, art and writing,” said Alan Searleman, PhD, from St. Lawrence University, New York.
小題5:They tend to have worse memories, often forgetting names and places.

Answer 1

小題1:B
小題2:A
小題3:F
小題4:E
小題5:C

試題分析：這篇短文主要解釋了左撇子現(xiàn)象,以及大腦兩個半球工作的原理.
小題1:根據(jù)上下文意思，如果你是左撇子，那你只占了世界人口的10%，說明我們生活在一個右撇子世界里，因為大多數(shù)人寫字和彈奏樂器都是用右手，故此題選B。
小題2:下文將到問什么有如此少的走撇子，這是因為在人類進(jìn)化當(dāng)中我們需要在一起合作生活，有些人為了在競爭方面比右撇子更有優(yōu)勢他們就會使用左手，給此題選A。
小題3:下文講到是左撇子的幾個天才人物，像愛因斯坦、牛頓、達(dá)爾文及美國的幾任總統(tǒng)，所以此空是主題句，故選F。
小題4:這段文字講了人的左右腦的功能問題，為什么左撇子天才較多？因為左撇子比右撇子更平均的使用了左右腦，故選E。
小題5:下文講的是左撇子的劣勢，他們有比較糟糕的記憶力，給此題選C（對左撇子而言并不是一切都是好的）