题目

Your brain and food We all know that what you eat can change your physical appearance. It also changes how your body functions, making it more or less difficult to pump blood, grow healthy bones or process insulin(胰岛素). New research presented this week at the Neuroscience 2012 conference suggests that what you eat can even change your brain and vice versa(反之亦然). Timothy Verstynen and his colleagues used a machine to observe the brain activity in 29 adults. The study participants were shown words on a screen in various colors and asked to identify the color, not the wor已知在Rt△ABC中，∠C=90°，．则=________．