题目

用NA表示阿伏加德罗常数的值，下列叙述错误的是(    ) A．NaH与H2O反应生成氢气，每生成0.6g氢气转移电子数为0.6NA B．12g镁在空气中充分燃烧，电子转移数目为NA C．0.1 mol熔融NaHSO4中含有阳离子数目为0.1 NA D．标准状况下，6.72 L O2和N2的混合气体含有的原子数目为0.6NA 答案：A 听力(共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三个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一小题。每段对话仅读一遍。 1．How will the woman pay for the hairdresser(理发师)? A．In cash． B．By check． C．By credit card(信用卡)． 2．What is the woman doing? A．Searching for a flat． B．Hunting for a job． C．Planning a suburban trip． 3．Why is the man afraid he can't attend the lecture? A．There aren't enough seats． B．The lecturer won't show up． C．He hasn't got a ticket to it yet． 4．What time will the two speakers get to the theatre if they leave now? A．At 7∶30． B．At 7∶45． C．At 8∶30． 5．What do we know about the man? A．He will stop doing his job． B．He is looking for a new job． C．He doesn't like his present job． 第二节(共15小题；每题1.5分，满分22.5分) 听下面5段对话或独白，每段对话或独白后有几个小题，从题中所给的A，B，C三个选项中选出最佳选项。听每段对话或独白前，你将有时间阅读各小题，每小题5秒钟；听完后各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 听第6段材料，回答第6至8题。 6．Where does the man suggest the woman go? A．To Canada． B．To Spain． C．To China． 7．Why does the woman want to travel in Canada? A．She loves nature there． B．She has a friend there． C．She has seen some great pictures about it． 8．What does the man ask the woman to do? A．Bring him some presents． B．Bring back some good photos． C．Write him when she gets there． 听第7段材料，回答第9至11题。 9．Where does this conversation probably take place? A．In a service centre． B．In a factory． C．In a store． 10．What do we know about the woman? A．She acts on a rule． B．She is impolite to the man． C．She makes an exception for the man． 11．What will the man most probably do with the player at last? A．Throw it away． B．Have it repaired． C．Return it to the woman． 听第8段材料，回答第12至14题。 12．What is wrong with the man? A．He has a toothache． B．His false teeth don't fit． C．He has a pain in his mouth． 13．What is the woman's attitude towards the man? A．She is worried about him． B．She is indifferent(漠不关心的)to him． C．She is polite to him． 14．When will the man go to see the woman? A．This morning． B．This afternoon． C．Tomorrow morning． 听第9段材料，回答第15至17题。 15．What is the woman? A．A girl of public relations． B．A clerk of after-sales service． C．A manager of marketing department． 16．How long has the man have the car? A．For a few days． B．For a few weeks． C．For a few months． 17．What is wrong with the man's car now? A．The oil light is always on． B．The engine doesn't work well． C．The wheels keep up a terrible noise． 听第10段材料，回答第18至20题。 18．Where is the speaker most probably giving the talk? A．At the entrance to the gardens． B．In a restaurant of the gardens． C．In the old family house． 19．What does the speaker tell the people to do first? A．Have their lunch． B．Visit the collections． C．Walk through the gardens． 20．How many sections are the gardens divided into? A．Two． B．Three． C．Four．