题目

用单色光做双缝干涉实验时，下列说法中正确的是(    )A.相邻干涉条纹之间的距离相等B.中央明条纹宽度是两边条纹宽度的2倍C.屏与双缝之间距离减小，则屏上条纹间的距离增大D.在实验装置不变的情况下，红光的条纹间距小于蓝光的条纹间距 答案：A 从A—G中选出可以填入对话空白处的最佳选项。选项中有两项为多余选项。     M：Hello．Jane．Have you ever been to the new sports centre? 1．W：No．never，Bob!   1      M：On Straight Road You know，near Long Street，beside the station．     W：Oh．Is it good? 2．M：Yes，it's great!  2   Last week l went there with my father and we played table tennis and volleyball． 3．W：  3      M：Not yet．They are going to build a swimming pool next year.     W：Is it expensive?     M：Not really．Jane．And on Saturday and Friday it stays open late-till 10 o'clock． 4．W：Oh，great．  4        M：I got the number 14 bus．It’s only ten minutes from the bus station Do you want to go next week?   W：OK．Any day except Sunday． 5．M：  5   Then we can stay late．     W：OK．Let's meet after school． A．That's a good idea． B．You can do lots of sports there C．Where is it? D．Why don't we go on Friday? E．What about swimming? F．It sounds like a great place to visit G．How did you get there last week?