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unit 3 a healthy life reading课时作业. 阅读理解under the cold clear water of lake huron,researchers have found a fiveandahalffootlong piece of wood that is 8,900 years old. the wood,which is tapered(使成锥形) on one side in a way that looks deliberate,may provide important clues to a mysterious period in north american prehistory. “this was the stage when humans gradually shifted from hunting large animals to fishing,gathering and agriculture,” said anthropologist john oshea. “but because most of the places in this area that prehistoric people lived in are now under water,we dont have good evidence of this important shift itself. we just have clues from before and after the change. ”with support from the national science foundation (nsf) and the national oceanic and atmospheric administration (noaa),oshea and his colleague guy meadows began exploring the area several years ago. in 2009 they reported finding a series of stone features that they believe were “drive lanes” used by ancient indian hunters. since that discovery,oshea and meadows have worked on identifying human campsites,which are typically located away from hunting areas. on their 25foot boat,the researchers first spotted the ancient wood object using a small piece of equipment with a camera. then a team of diversincluding osheawent down about 100 feet to get it. the woods age has now been fixed by means of carbon dating. it is currently undergoing more detailed analyses to determine whether there has been human modification,which visual examination suggests. “the first thing you notice is that it appears to have been shaped with a rounded base and a pointed tip,” oshea said. “it must have been created. it looks like it might have been used as a tent pole or a pole to hang meat. ”in addition to the wood,the researchers have collected many other samples from the bottom of the lake. oshea and his colleagues will need to wait for calmer weather before they can resume their search for evidence of human life under the great lake. 【语篇解读】考古学家们的新发现有望印证远古人类从游猎文明到农耕文明的转变。1during the mysterious period mentioned in the passage,the lake huron area _. awas deserted by ancient indiansbwitnessed the start of agriculturecwas taken up by large animalsdbegan to be covered by water答案b推理判断题。从第一、二段的“. . . may provide important clues to a mysterious period in north american prehistory. . . ;when humans gradually shifted from hunting large animals to fishing,gathering and agriculture”可知,b项正确。2which of the following statements is wrong?athe findings of john oshea and his colleagues may prove a previous theory. bthe effort that john oshea and meadows made before 2010 was meaningless. csome equipment was used to support the discovery. djohn oshea and his colleagues didnt draw the final conclusion from visual examination. 答案b细节理解题。从第三段的“in 2009 they reported finding a series of stone features that they believe were drive lanes used by ancient indian hunters. ”可知,john oshea和meadows之前的研究也是有成效的。3whats the fourth paragraph mainly about?ahow the wood was found. bwhy the wood is important. cpreparations that were made for the discovery of the wood. dconclusions the experts have made from the discovery of the wood. 答案a段落大意题。本段主要交待了john oshea 和同事们怎样找到这块木头的。4what do we know about the future plan of john oshea and his colleagues?athey will explore another lake soon. bthey will study the weather around lake huron. cthey will have a long holiday before going back to work. dthey will continue to explore lake huron. 答案d细节理解题。从最后一段的“oshea and his colleagues will need to wait for calmer weather before they can resume their search for evidence of human life under the great lake. ”可知答案。. 七选五every scientific field uses the scientific method to conduct experiments. performing experiments is very important in the field of psychology(心理学)before beginning a study,however,any scientist who wishes to perform an experiment should be familiar with the steps of the scientific method. _1_form a hypothesis(假设)it is an educated guess about what will happen during the study. _2_coming up with a hypothesis before you start can help guide your experiment. plan out a study. planning out the experiment is essential because the psychologist needs to know if they have time,materials,and testing areas prepared beforehand. this step also helps the scientists to determine if they will be performing descriptive or experimental research. the ideal situation is to always perform experimental research. _3_descriptive research simply collects data regarding the problem and forms a hypothesis according to the data. collect data. _4_if the data collected is not recorded and organized,the entire efforts of the study may be wasted. the best way to do this may be to record the proceedings so that no details are lost. analyze the data. once all the data has been collected and organized,it must be analyzed. using previous research or scientific information about the problem,the psychologist must apply the new data gathered. publish the information learned. the final step of the scientific method in psychology is publishing the results of the study. _5_most psychological experiments are published in scientific journals. ait is based on scientific facts,not just opinions. bread on to find out how to use the scientific method in psychology. cbefore psychologists start the experiment,they must plan out the steps. dthis helps other psychologists to learn about and use the new information. ethe scientific method has proved to be an effective way to conduct research. fto fully understand the study,each part of the experiment must be recorded. gsometimes,however,this is impossible and descriptive research will have to be used. 【语篇解读】本文是一篇说明文,主要阐明了如何在心理学实验中使用科学的方法。1b根据空前的“the scientific method”可知,选b项,用来指明如何在心理学实验中使用科学的方法。2a根据本段第一句“form a hypothesis(假设)”以及空后的“coming up with a hypothesis before you start can help guide your experiment”可知,本段主要阐述了心理学实验的第一步:形成一个假设,以科学事实而不仅仅是观点为根据。故a项正确。3g空前的“to always perform experimental research”与g项中的“this”相对应;空后的“descriptive research”与g选项中的“descriptive research”相对应,用以阐明描述性研究的特点,故g项正确。4f根据空后的“if the data collected is not recorded and organized,the entire efforts of the study may be wasted”“record the proceedings”可以判断,空处阐述的是将数据记录下来的重要性,故f项正确。5d根据该段首句“publish the information learned”可知,该段主要阐述将实验得出的结论公开出版,故选d,这有助于其他心理学家学习和使用新的信息。. 语法填空harrys parents love him very much and expect he can become 1. _(success)so they often tell him just to study hard while they do everything else for their eighteenyearold son. once harrys father 2. _(send)to london on business. he would stay there for half a year. before 3. _(leave),he told his wife to take good care of their son. the woman had to get up earlier and did all 4. _her husband did before. then two months later the 5. _(exhaust)woman was ill in bed. now harry was 6. _helpless that he had to do as his mother told him. yesterday harrys mother told him to buy a new pair of shoes and suggested a shoe pattern. 7. _the help of a policeman,harry wouldnt have found the shop. the shopkeeper was friendly and offered various shoes to him. when he was trying on a pair,he 8. _(sudden) remembered something and took them off. the man was surprised and asked,“whats 9. _matter,young man?”“im sorry. i 10. _(leave) the shoe pattern at home. ”答案1. successful设空处作表语且意为“成功的”,故填successful。2was sent由语境可知send所表示的动作发生在过去,且father与send之间是被动关系,故填was sent。3leaving介词后需跟动词ing形式作宾语,且he与leave之间是逻辑上的主谓关系,故填leaving。4that设空处引导限制性定语从句修饰all,且在从句中作did的宾语,故填that。5exhausted设空处作定语修饰名词woman,且意为“疲惫不堪的”,故填exhausted。6soso. . . that. . . 是固定句型,意为“如此以至于”。7without由wouldnt have found可知,本句是含蓄条件句,故填without。8suddenly设空处作状语修饰动词remembered,故填suddenly。9thewhats the matter是固定表达,意为“出了什么事”。10have left由语境可知,设空处是对已经发生的情况的描述,强调对现在造成的影响,故填have left。. 写作第一节应用文写作假定你是李华。近日收到美国朋友nancy的邮件,说她下周六晚上7点在市图书馆报告厅作题为“美国风俗与文化”的讲座,邀请你来观摩。请给她写封回信,要点如下:1婉拒邀请;2陈述理由;3表达感谢。注意:1. 词数80左右,信的开头和结尾已给出,不计入总词数;2可以适当增加细节,以使行文连贯。dear nancy,im so glad to receive your invitation to your lecture in the city library. yours, li hua【参考范文】dear_nancy,im_so_glad_to_receive_your_invitation_to_your_lecture_in_the_city_library. id much like to learn something about american customs and culture,but a friend of mine is coming to pay me a visit,and since this is the first time he has come here,i will have to meet him at the railway station at 7 pm next saturday. its really a pity that i cant make it to communicate with you face to face,and im sorry for that. anyway,im fairly grateful to you for the kind invitation. if there is another chance in future,i will try every possible means to learn from you. yours,li_hua第二节读后续写阅读下面短文,根据所给情节进行续写,使之构成一个完整的故事。this interesting story tells the moral lesson of “think before you act”once upon a time,there was a thin donkey by the name of udhata who worked with a washerman. the donkey carried a lot of clothes to the riverbank every day. he was made to work_hard. after such heavy work loads,the donkey needed to be fed well but he was not satisfied with the food offered by the washerman. so,udhata wandered_around in the nearby fields and ate crops secretly. during one of those nights,he met a dog and they became_friends. now,it became a routine_affair for both friends to quietly wander in the nearby fields and eat cucumbers to the full. soon,the donkey started to appear fat and healthy. one night,after eating cucumbers the donkey felt extremely happy and satisfied. he expressed a desire to his friend about how he wanted to sing a song. the dog,being the smarter one,warned him against any such expression. he warned udhata about guards sleeping in the fields. but the donkey had none of the dogs arguments. the dog tried really hard to persuade him about the consequences but the donkey was in no mood to listen to him. the dog,knowing the scary consequences,jumped over to the other side of the fence and decided_to wait. the donkey started to sing. on hearing his annoying voice,a guard woke_up and came rushing to the donkey in great anger. the guard beat the donkey black and blue and he was left on the ground in_poor_condition. after some time,udhata managed to stand up and then he found the dog
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