格兰德中学是美国首都华盛顿的一所普通中学。在这所学校的一个教室里，学生坐在三维动画“虚拟现实”电脑前，只需戴上一副视目镜，手握操纵杆，便可进入栩栩如生的微观世界。假如你想创造一个水分子，只要通过电脑采集一个电子和中子，就能看到一个网球状的水球。此外，利用 Grand Middle School is a general secondary school in Washington, the capital of the United States. In a classroom in the school, students sit in front of a three-dimensional animated “virtual reality” computer, wearing a pair of eyepieces and holding a joystick to enter the lifelike microscopic world. If you want to create a water molecule, you can see a tennis ball as long as you collect an electron and a neutron from your computer. In addition, use