题目

如图是一条光线在空气和玻璃界面上发生的反射、折射光路图，下列说法中正确的是（） A . MN 是空气和玻璃的界面 B . AO 是入射光线 C . 入射角的度数是 30° D . PQ 的右边介质时空气 答案：C 阅读理解 阅读理解 The oldest man has just celebrated his hundredth birthday and the reporter of a paper called on him. After congratulating the old fellow, the reporter asked a few questions. “For what reason do you live so long?” The reporter asked. The old man thought a moment and then, holding up his fingers, began “I never smoke, drink or overeat and always rise at six in the morning.” “But,” the reporter didn’t agree and said, “I had an uncle who acted in this way, yet he only lived to be eighty. How do you explain the cause of that?” 1. The reporter called on the old man ________. [　　] A. soon after his birthday B. on his birthday C. because he didn’t believe the old man lived so long D. as soon as he received an invitation from the old man 2. The reporter asked the old man ________. [　　] A. what he usually drank or ate for health B. how he had been able to live so many years C. how he enjoyed his hundredth birthday D. what he should do in order to keep fit 3. The word “overeat” means ________. [　　] A. eat after the usual dinner time B. eat before the usual dinner C. eat more meat but fewer vegetables D. eat too much 4. The reporter was not satisfied with the old man’s reply because he knew that ________. [　　] A. smoking and drinking are harmful to the health B. the old man did not tell the truth C. the old was not really a hundred years old D. his uncle didn’t live as long as the old man 5. According to the old man the difference between the old man and the uncle was that ________. [　　] A. in the morning the old man got up earlier than the uncle B. the uncle didn’t get in touch with the old man C. the uncle did not continue the health-keeping D. the uncle didn’t give up the health-keeping measure