题目

将标有“110V、40W”白炽灯L1和标有“110V、100W”白炽灯L2，与一只滑动变阻器（0～300Ω）组合起来接在220V的线路上，使L1 、L2都能正常发光，下图中能正常发光耗电又最小的接法是               （  ） 答案：C 解析: 略 听力(共两节，满分30分) 第一节(共5小题；每小题1.5分，满分7.5分) 听下面5段对话，每段对话后有一个小题，从题中所给的A、B、C三选项中选出最佳选项，听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下个小题，每段对话仅读一遍。 例：How much is the shirt? A．19.15． B．9.15． C．9.18． 答案是B． 1．How much will the man pay for the tickets? A．￡7.5． B．￡15． C．￡50． 2．Which is the right gate for the man’s flight? A．Gate 16． B．Gate 22． C．Gate 25． 3．How does the man feel about going to school by bike? A．Happy． B．Tired． C．Worried． 4．When can the woman get the computers? A．On Tuesday． B．On Wednesday． C．On Thursday． 5．What does the woman think of the shirt for the party? A．The size is not large enough． B．The material is not good． C．The color is not suitable． 二、听力第二节(共15小题，每小题1.5分，满分22.5分)听下面5段对话。每段对话后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项。听每段对话前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话读两遍。 听下面一段对话，回答第6和第7两个小题。 6．What can we learn about Mr．Brown? A．He is in his office． B．He is at a meeting． C．He is out for a meal． 7．What will the man probably do next? A．Call back． B．Come again． C．Leave a message． 听下面一段对话，回答第8和第9两个小题。 8．What kind of room does the man want to take? A．A single room． B．A double room． C．A room for three． 9．What does the man need to put in the from? A．Telephone and student card numbers． B．Student card number and address． C．Address and telephone number． 听下面一段对话，回答第10至第12三个小题。 10．What is the relationship between the speakers? A．Fellow clerks． B．Boss and secretary． C．Customer and salesperson． 11．What does the man like about his job? A．Living close to the office． B．Chances to go abroad． C．Nice people to work with． 12．What do we know about the woman? A．She likes traveling． B．She is new to the company． C．She works in public relations． 听下面一段对话，回答第13至第16四个小题。 13．When will the visitors come? A．In March． B．In April． C．In May． 14．How many visitors are coming? A．8． B．10． C．12． 15．What will the visitors do on the second day? A．Go to party． B．Visit schools． C．Attend a lecture． 16．Where will the visitors go on the final day? A．To London． B．To Scotland． C．To the coast． 听下面一段对话，回答第17至第20四个小题。 17．What is the first word the baby tried to say? A．Truck． B．OK． C．Duck． 18．How old was the baby when he learned to say that word correctly? A．about18 months B．about 21 months C．about 24 months 19．What did the father do when the baby screamed that word at the airport? A．He corrected the baby． B．He tried to stop the baby． C．He did himself somewhere． 20．Why did the mother pretend not to know the baby? A．She got angry with the father． B．She was frightened by the noise． C．She felt uneasy about the noisy baby．