题目

关于作用力与反作用力以及相互平衡的两个力的下列说法中，正确的是（    ）A.作用力与反作用力一定是同一性质的力B.作用力与反作用力大小相等、方向相反，因而可以互相抵消C.相互平衡的两个力的性质，可以相同，也可以不同D.相互平衡的两个力大小相等、方向相反，同时出现、同时消失 答案：解析：一对作用力和反作用力一定是同性质的力，且等大反向，但分别作用于两个不同物体上，因而两个力不能合成、不能抵消，A对B错.一对平衡力是作用于同一物体上等大、反向、共线的两个力，性质可能相同，也可能不同，一个力变化时另一个力可以不变，故C正确，D错.答案：AC 第一节(共5小题，每小题1分，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．Why didn't the man call the woman? A．He had no change． B．He wasn't in the service area． C．He was just a few minutes late． 2．What will the speakers do next? A．Wait for their friends． B．Go to join their friends． C．Have the car repaired． 3．How much will the man pay in total? A．400 dollars． B．480 dollars． C．640 dollars． 4．Why won't the woman go travelling? A．She doesn't like traveling by air． B．She toured Europe last year． C．She doesn't have enough money． 5．What does the woman think of the meeting? A．She is unsatisfied with it． B．It went very well． C．The man should talk more about his opinion． 第二节(共15小题；每小题1分，满分15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，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题给出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、7题。 6．What will the speakers do next Friday? A．Water the garden． B．Go shopping． C．Have a picnic． 7．Which is NOT part of their overseas markets yet? A．Europe． B．Australia． C．South Africa． 听第7段材料，回答第8至10题。 8．What did the speakers do last year? A．They asked Gail for help． B．They organized a party． C．They planted some turnips． 9．What does the man think of Gail? A．She is optimistic． B．She is friendly． C．She is unhelpful． 10．When did the woman talk to Gail? A．Last month． B．Last week． C．Yesterday． 听第8段材料，回答第11至13题。 11．Where did the woman watch the movie last night? A．At the cinema． B．At home． C．At the man's house． 12．How did the man find out about the film? A．From the newspaper． B．From TV． C．From the woman． 13．Which aspects of the movie did the woman especially like? A．The actors and music． B．The plot and the acting． C．The plot and the setting． 听第9段材料，回答第14至17题。 14．What are the speakers talking about? A．Stories． B．Pictures． C．Friends． 15．Why does the woman think it stressful to go to the dentist? A．It hurts． B．It is embarrassing． C．You can do nothing about it． 16．What does the man think is the most stressful? A．Moving to a new place． B．Taking an exam． C．Being late． 17．What does the woman think of having an interview? A．Enjoyable． B．Stressful． C．Challenging． 听第10段材料，回答第17至20题。 18．What is checked in the first test? A．Your eyesight． B．Your driving skills． C．Your knowledge of traffic regulations． 19．What does the instruction permit allow you to do? A．Practice driving with an experienced driver． B．Drive under normal highway condition． C．Have the car checked by the license． 20．What should you take with you when taking the road test? A．Your identification． B．Your instruction permit． C．Your car．