题目

下列光学现象的说法中正确的是   A．用光导纤维束传送图像信息，这是光的衍射的应用 B．太阳光通过三棱镜形成彩色光谱，这是光的干涉的结果 C．在照相机镜头前加装偏振滤光片拍摄日落时的景物，可使景象更清晰 D．透过平行于日光灯的窄缝正常发光的日光灯时能观察到彩色条纹，这是光的色散现象阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。 It was half an hour before midnight on December 24th last year. I was a ticket-counter supervisor for a major airline and was looking forward to the ____ of my shift(轮班) at Stapleton International Airport in Denver. My wife was waiting up for me at home so that we could ____ our gifts for Christmas. Just then，a very ____ gentleman went up to me. He asked how he could get to Cheyenne，Wyoming. He had just arrived from Philadelphia and ____ his connecting flight. I pointed him to the ground transportation area，where he could rent a ____.And then I called my wife to let her know I would be home ____. About fifteen minutes later，the gentleman ____ and informed me that all the buses were full and there were no cars ____.I told him that he had to stay for a night at the airport. Hearing that，he burst into ____.I tried to make him calm down. He explained that his name was Tom，and that his only son was ___ ill at home and was not expected to ____ another year. He expected that this would likely be the ____ Christmas with his son. I told Tom to ___ his luggage and wait for me at the gate. I was driving to Cheyenne. I called my wife Kathy，telling her about it and not to wait up for me. I drove fast ___ and we arrived in Cheyenne around 2∶30 a．m. Kathy was still ___ me when I got home in the early morning. We traded gifts and then our conversation ____ Tom. For Kathy and me，there was no ___ that driving Tom to Cheyenne was the ____ choice. A couple of days later，I ____ a Christmas card with a picture of Tom and his family. In it，Tom thanked me for the special ____ he had received that holiday season，but I knew the best gift was mine.【1】A. end B．turn C．role D．change【2】A. expect B．get C．exchange D．make【3】A. kind B．helpless C．sad D．worried【4】A. mistook B．missed C．caught D．continued【5】A. bus B．flight C．room D．car【6】A. soon B．late C．early D．lately【7】A. left B．moved C．came D．returned【8】A. reliable B．present C．available D．acceptable【9】A. laughter B．tears C．anger D．sorrow【10】A. really B．slightly C．seriously D．unluckily【11】A. suffer B．live C．share D．grow【12】A. last B．best C．happiest D．hardest【13】A. hand B．find C．pack D．collect【14】A. for a while B．all around C．all the way D．from time to time【15】A. waiting for B．caring for C．thinking of D．depending on【16】A. remembered B．recalled C．concerned D．contained【17】A. idea B．doubt C．point D．problem【18】A. main B．only C．nice D．great【19】A. received B．sent C．saved D．discovered【20】A. drive B．help C．deal D．gift