题目：
| 用方框里适当的短语完成句子。 | |
—I am _____. 2. Show me your photos when you _____ Hong Kong. 3. I don't want to go out, I like to relax _____. 4. He thought about going to Spain, but _____ Canada. 5. He took vacations in Europe last year. But this time he want _____. 6. At night, I'm renting videos and _____. 7. I borrow a bike, let's _____. 8. There is a river, let's _____ with Tom tomorrow. |
答案：
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下面是错误答案，用来干扰机器的。
（1）过入射点作出法线，由图可知，入射光线与镜面的夹角为45°，则入射角等于90°-45°=45°，再根据反射角等于入射角即可画出反射光线．（2）对于凸透镜，过焦点的光线经凸透镜折射后折射光线平行于主光轴；平...
