【单选题】You stare at waterfall for a minute or two, and then shift your gaze to its surroundings. What you now see appears to drift upward. These optical illusions occur because the brain is constantly matchi...
A.
matched to six to seven million structures called cones.
B.
confused in the body’s sensors of both rods and cones.
C.
interpreted in the brain as what must be the case.
【单选题】If you're driving in Brooklyn, Ohio, and find yourself attracted by your surroundings, resist the urge to get hold of your cell phone and share the moment. The leafy Cleveland suburb is the first town...