题目

下列观察对岸的树木在水中倒影的光路图，正确的是A. B.C. D. 答案：【答案】A【解析】树木在水中倒影，是因为来自岸上树木的光线斜射到水面上发生反射，反射光线进入眼睛，所以才能观察到对岸的树木在水中的倒影，故选A。完成对话 Tom：1 ________ you 2 ________ part in the maths contest yesterday, Wei Wei ? Wei：Yes, I did, but I was five minutes 3 ________ . Tom：You didn't leave home early,4 ________ 5 ________ ? Wei：6 ________ , I 7 ________ . On my way to school, I 8 ________ a watch on the ground. I 9 ________ 10 ________ 11 ________ and gave it to the policeman. So I was late for the contest. 12 ________ , I could still take part in the maths contest.