人的眼睛像一架神奇的照相机，晶状体相当于照相机的____镜，外界物体在视网膜上所成的像是____的实像．（选填“正立”或“倒立”）．常见的视力缺陷有____和____．来自远方物体的光，经眼球折光系统折射后成像情况如图所示．根据该光路图，这个人可配戴____透镜的眼镜加以矫正，它的作用是使像相对于晶状体向____（选填“前”或“后”）移．

    My name is Maggie.I am a 13-year-old Canadian girl. I live in Toronto. It's a very big city. I can speak English and French. I have classes from 8:00 a.m. to 2:40 p.m. I have lunch at school. Many girls love playing volleyball after school, but I like swimming. I have a big family, my father, my mother and two brothers. I think China is a great country. I want a Chinese pen pal.

    Please sendemails to me if you want to be my pen pal. My email address is maggie13@yahoo.com.