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A Heroic Woman The whole of the United States cheered its latest hero,Ashley Smith,with the Federal Bureau of lnvestigation saying it was planning to give a big reward to her for having a brave heart and wise mind. （46）She was moving into her apartment in Atlanta,Georgia early on the morning of March 12,when a man followed her to her door and put a gun to her side.“I started walking to my door,and I felt really,really afraid,”she said in a TV interview last week.The man was Brian Nichols,33.He was suspected of killing three people at an Atlanta courthouse(法院)on March 11 and later of killing a federal agent.（47） Nichols tied Smith up with tape,but released her after she repeatedly begged him not to take her life.“I told him if he hurt me,my little girl wouldn’t have a mummy,”she said.In order to calm the man down,she read to him from“The Purpose-Driven Life”,a best-selling religious book.He asked her to repeat a paragraph“about what you thought your purpose in life was-what talents were you given.”（48） “I basically just talked to him and tried to gain his trust,”Smith said. Smith said she asked Nichols why he chose her.“He said he thought I was an angel sent from God,and we were Christian sister and brogher,”she said.“And that he was lost,and that God led him to me to tell him that he had hurt a lot of peopole.”（49）She said Nichols was surprised when she made him breakfast and that the two of them watched television coverage(报道)of the police hunt for him.“I cannot believe that’s me,”Nichols told the woman.Then,Nichols asked Smith what she thought he should do.She said,“I think you should turn yourself in.If you don’t,lots more people are going to get hurt.” Eventually,he let her go.（50）A US$60,000 reward had been posted for Nichols’ capture.Authorities said they did not yet know if Smith would be eligible(有资格的)for that money. 50（）
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When We Are Asleep Everyone dreams,but some peopole never recall their dreams,or do so very rarely.Other people always wake up with vivid recollections (记忆) of their dreams,though they forget them very quickly.In an average night of eight hours’ sleep,an average adult will dream for around one hundred minutes,probably having three to five dreams,each lasting from ten to thirty minutes. Scientists can detect when someone is having a dream by using an instrument which measures the electrical waves in the brain.During dreaming,these waves move more quickly.Breathing and pulse rate also increase,and there are rapid eye movements under the lids,just as though the dreamer were really looking at moving objects.These signs of dreaming have been detected in all mammals (哺 乳动物) studied,including dogs,monkeys,cats,and elephants,and also some birds and reptiles (爬行动物).This period of sleep is called the“D”state for around 50% of their sleep;the period reduces to around 25% by the age of 10. Dreams take the form of stories,but they may be strange and with incidents not connected,which make little sense.Dreams are seldom without people in them and they are usually about people we know.One estimate says that two-thirds of the“cast”of our dream dramas are friends and relations.Vision seems an essential part of dreams,except for people blind from birth.Sound and touch are senses also often aroused,but smell and taste are not frequently involved.In“normal”dreams,the dreamer may be taking part,or be only an observer.But he or she cannot control what happens in the dream. However,the dreamer does have control over one type of dream.This type of dream is called a“lucid”(清醒的) dream.Not everyone is a lucid dreamer.Some people are occasional lucid dreamers.Others can dream lucidly more or less all the time.In a lucid dream,the dreamer knows that he is dreaming. When we dream,there is less movement of electrical waves in our brains.
（三）背景资料某施工总承包单位承担一项建筑基坑工程的施工。基坑开挖深度12m，基坑南侧距坑边6m 处有一栋6 层住宅楼。基坑土质状况从地面向下依次为：杂填土0～2m，粉质土2～5m，砂质土15～10m，粘性土哟10 ～12m，砂质土12～18m。上层滞水水位在地表以下5m（渗透系数为0.5m／d）,地表下18m 以内无承压水。基坑支护设计采用灌注桩加锚杆。施工前，建设单位为节约投资，指示更改设计，除南侧外其余三面均采用土钉墙支护，垂直开挖：基坑在开挖过程中北侧支护出现较大变形，但一直未被发现，最终导致北侧支护部分坍塌。事故调查中发现：（1）施工总承包单位对本工程作了重大危险源分析，确认南侧毗邻建筑物、临边防护、上下通道的安全为重大危险源，并制订了相应的措施，但未审批。（2）施工总承包单位有健全的安全制度文件。（3）施工过程中元任何安全检查记录、交底记录及培训教育记录等其他记录资料。问题 施工总承包单位还应采取哪些有效措施才能避免类似基坑支护坍塌？
Robots May Allow Surgery in Space Small robots designed by University of Nebraska researchers may allow doctors on Earth to help perform surgery on patients in space. The tiny,wheeled robots,（51）are about 3 inches tall and as wide as a lipstick case,can be slipped into small incisions(切口)and computer-controlled by surgeons in different locations.Some robots are equipped（52）cameras and lights and can send images back to surgeons and others have surgical tools attached that can be（53）remotely. “We think this is going to （54）open surgery,”Dr Dmitry Oleynikov said at a news conference.Oleynikov is a （55）in computer-assisted surgery at the University of Nebraska Medical Center in Omaha. Officials hope that NASA will teach（56）to use the robots soon enough so that surgeries could one day be performed in space. On earth,the surgeons could control the robots themselves（57）other locations.For example,the robots could enable surgeons in other places to （58）on injured soldiers on the front line.Researchers plan tp seek federal regulatory（59）early nest year.Tests on animals have been successful,and tests on humans in England will begin very soon. The camera-carrying robots can provide（60）of affected areas and the ones with surgical tools will be able to maneuver(操控)inside the body in ways surgeons’ hands can’t.The views from the camera-carrying robots are （61）than the naked eye,because they（62）back color images that are magnified(放大).Because several robots can be inserted through one incision,they could reduce the amount and （63）of cuts needed for surgery,which would decrease recovery time.This is particularly（64）to those patients who have been debilitated(使虚弱)by long illness. Eventually,Oleynikov said,the tiny robots may enable surgeons to work without ever（65）their hands in patients’ bodies.“That’s the goal,”Oleynikov said.“It’s getting easier and easier.We can do even more with these devices.”
Robots May Allow Surgery in Space Small robots designed by University of Nebraska researchers may allow doctors on Earth to help perform surgery on patients in space. The tiny,wheeled robots,（51）are about 3 inches tall and as wide as a lipstick case,can be slipped into small incisions(切口)and computer-controlled by surgeons in different locations.Some robots are equipped（52）cameras and lights and can send images back to surgeons and others have surgical tools attached that can be（53）remotely. “We think this is going to （54）open surgery,”Dr Dmitry Oleynikov said at a news conference.Oleynikov is a （55）in computer-assisted surgery at the University of Nebraska Medical Center in Omaha. Officials hope that NASA will teach（56）to use the robots soon enough so that surgeries could one day be performed in space. On earth,the surgeons could control the robots themselves（57）other locations.For example,the robots could enable surgeons in other places to （58）on injured soldiers on the front line.Researchers plan tp seek federal regulatory（59）early nest year.Tests on animals have been successful,and tests on humans in England will begin very soon. The camera-carrying robots can provide（60）of affected areas and the ones with surgical tools will be able to maneuver(操控)inside the body in ways surgeons’ hands can’t.The views from the camera-carrying robots are （61）than the naked eye,because they（62）back color images that are magnified(放大).Because several robots can be inserted through one incision,they could reduce the amount and （63）of cuts needed for surgery,which would decrease recovery time.This is particularly（64）to those patients who have been debilitated(使虚弱)by long illness. Eventually,Oleynikov said,the tiny robots may enable surgeons to work without ever（65）their hands in patients’ bodies.“That’s the goal,”Oleynikov said.“It’s getting easier and easier.We can do even more with these devices.”
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