光线从空气射向玻璃砖，当入射光线与玻璃砖表面成30°角时，折射光线与反射光线恰好 发布时间：2017-07-26 11:06 │ 来源：www.tikuol.com 题型：选择题 问题： 光线从空气射向玻璃砖，当入射光线与玻璃砖表面成30°角时，折射光线与反射光线恰好垂直，则此玻璃砖的折射率为（ ）A．2B．3C．22D．33
题型：选择题 完形填空。 A Frenchman went to visit New York. He didn't know English. When he 1 New York, he 2 a bus to a hotel. It was Sunday. The Frenchman went out for a walk. As he went 3 the street, he suddenly thought of his way back. So he decided to write down the name of the street. On the wall near the corner of the street, he saw some English words. He wrote them down in his notebook. "Now I know the name of the street," he said to 4 . "It'll be easy for me to 5 the hotel." He walked for a long time in the city, then he felt tired and wanted to go back. He took the notebook out of his pocket and 6 the name of the street to a young man. The young man read the words, but he didn't know what the Frenchman wanted. The Frenchman decided to ask 7 . He stopped an old man. The old man read the words but he didn't know what the Frenchman wanted, 8 . Then the Frenchman saw a young woman. The young woman knew 9 French. When the Frenchman showed her words in his notebook and asked where the street was, the young woman 10 ,for in the Frenchman's notebook, there were only three words, "One Way Street"- it was not a street name.( )1. A. reached to ( )2. A. had ( )3. A. along ( )4. A. a policeman ( )5. A. come to ( )6. A. read ( )7. A. himself ( )8. A. too ( )9. A. a little ( )10.A. cried B. got B. took B. across B. the man B. walk to B. put B. someone B. either B. some B. laughed C. arrived in C. drove C. away C. himself C. return to C. showed C. others C. neither C. many C. thought 查看答案
s way back. So he decided to write down the name of the street. On the wall near the corner of the