[单项选择]第三篇 Controlling Robots with the Mind Belle， our tiny monkey， was seated in her special chair inside a chamber at our Duke University lab. Her right hand grasped a joystick （操纵杆） as she watched a horizontal series of lights on a display panel. She knew that if a light suddenly shone and she moved the joystick left or right to correspond to its position， she would be sent a drop of fruit juice into her mouth. Belle wore a cap glued to her head. Under it were four plastic connectors， which fed arrays of microwires-each wire finer than the finest sewing thread- into different regions of Belle’s motor cortex （脑皮层）， tile brain tissue that plans movements and sends instructions. Each of the 100 microwires lay beside a single motor neuron （神经元）。 When a neuron produced an electrical discharge， the adjacent microwire would capture the current and send it up through a small wiring bundle that ran from Belle’s cap to a box of electronics on a table next to the booth. The box， in turn， was
A. a plastic box next door.
B. a computer at Cambridge University，
C. a box of electronics in the booth.
D. a box which， in turn， was linked to two computers