2010年中考英语阅读理解复习题3
Today, about 15% of the number of people is left-handed. But why are people left-handed? The answer is the way the brain (大脑) works. The brain has two halves---- the right half controls the left side of the body, and the left controls the right side of the body. So right-handed people have a strong left-brain and left-handed people have a strong right brain.