题目

分解因式：______________． 答案：【分析】 根据提公因式法及平方差公式可直接进行求解． 【详解】 解： ； 故答案为 ． 【点睛】 本题主要考查因式分解，熟练掌握因式分解的方法是解题的关键．听下列5段对话。每段对话后有一小题，从题中所给的A，B，C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟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．What is the man doing? [　　] A．Asking for help. B．Making suggestions. C．Asking for permission. 2．What do we know about the speakers? [　　] A．They want to have a cup of coffee. B．They agree to have a cup of coffee. C．The woman couldn't accept the man's suggestion. 3．Where does the conversation take place? [　　] A．At home. B．In a shop. C．In a museum. 4．What are the two speakers talking about? [　　] A．A railway station. B．A cinema. C．A film. 5．When will Mr. Brown have to be at the airport? [　　] A．By 8:30. B．By 9:30. C．By 10:30. 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，并标在试卷的相应位置。听每段对话或独白前，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。每段对话或独白读两遍。 听第6段材料，回答第6至第8题。 6．Why does the man think he was lucky to get the job? [　　] A．He likes the job. B．He likes the factory. C．He is able to live in the little village. 7．How did the man sleep last night? [　　] A．He woke up for several times. B．Very well. C．He couldn't go to sleep. 8．Why couldn't the woman sleep well? [　　] A．She was not used to the silence. B．She was afraid of the bird. C．She was too tired. 听第7段，回答第9至11题。 9．What is the man's plan for the winter vacation? [　　] A．Go deer hunting. B．Go traveling. C．Go to visit three big cities. 10．Why does the man decide to do this? [　　] A．To see his friends. B．To collect money. C．To amuse himself. 11．Whom will the man go with? [　　] A．The woman. B．His family. C．His friends. 听第8段，回答第12、13题。 12．Where does the conversation take place? [　　] A．In a drug store. B．In a pet shop. C．In a zoo. 13．What is the man complaining about? [　　] A．They sold him a dead cat. B．The cat always sleeps. C．The cat is too tired to move. 听第9段，回答第14至16题。 14．What is the man looking for? [　　] A．A bookstore. B．A town guide. C．A shoe repair shop. 15．What do we know about the man? [　　] A．He was shown the wrong way. B．He remembered the way wrongly at first. C．He didn't understand what the woman said. 16．How does the woman seem to be? [　　] A．In a hurry to leave. B．Curious about the man. C．Pleased to help the man. 听第10段，回答第17至20题。 17．What is the couple's nationality? [　　] A．British. B．French. C．Chinese. 18．What happened to the couple's pet dog? [　　] A．It was well fed in the kitchen. B．It was killed in the kitchen. C．It had a meal with the old couple. 19．How long did the couple have to wait before their food was ready? [　　] A．About an hour. B．Half an hour. C．An hour and a half. 20．How does the woman feel about what the man said? [　　] A．It is true. B．It is wrong to do so. C．It is unbelievable.