问题
操作题
小丽同学在生日那天收到一个水晶球礼物，透过水晶球可以看到对侧球面上A点的图案，眼睛及A点的位
置如图所示，请你画出她看到A点的光路图（注意：球面上任一点的法线都经过球心）。
答案
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小丽同学在生日那天收到一个水晶球礼物，透过水晶球可以看到对侧球面上A点的图案，眼睛及A点的位置如图所示，请你画出她看到A点的光路图（注意：球面上任一点的法线都经过球心）。
| 读下面一段话，将合适的词的序号填入括号内。 |
| I 1 a girl. My name is Ann. I get up at 6 in the morning. I usually go to school 2 Monday to Friday. I like playing the piano. Now I 3 the piano in my room. What's my mother doing ? Oh, she 4 dinner in the kitchen. What about my father ? He 5 something in the study. I have a happy family. |
| ( ) 1. A. is ( ) 2. A. from ( ) 3. A. am playing ( ) 4. A. cooks ( ) 5. A. writes | B. am B. to B. play B. cook B. is writing | C. are C. for C. playing C. is cooking C. write |