题目

     At Dulles High school in Sugar Land, Texas, the roster(候选名单)for Advanced Chinese begins with Jason Chao and ends with Kathy Zhang. In between comes an unexpected name: Elizabeth Hoffman. Hoffman, now a 12th grader, began learning Chinese in the eighth grade, has spent a summer studying in Nanjing and plans to perfect her Mandarin next fall. When asked by her peers---why she is learning Chinese, she responds with a question: “why aren’t you?” As China rushes toward superpower status, America’s schools and government officials are responding to Hoffman’s opinion21、下图是眼球的结构和照相机结构示意图。据图回答 （1）在眼球结构中，[2]表示____________，[9]表示____________。 （2）眼球结构中与照相机有许多相似之处，其中相当于照相机A结构的是眼球结构中的____________，相当于照相机结构B的是眼球结构中的____________。 （3）如果把人的眼球比作一架照相机，那么装入的底片相当于眼球结构图中的[  ]_________。 （4）守门员注视从远处向他飞来的足球时，图中[4]发生的变化是____________。 （5）如果不注意用眼卫生，就容易造成假性近视，这时图中[4]的特点是____________。 （6）有一失明患者。经检查眼球的结构完好无损，原因之一可能是图中[  ] ____________发生了病变。