The physicians in a hospital form the center of medical staff. But they could not provide effective medical care to their patients without the help of numerous other medical employees. From the viewpoint of the patients, the nursing staff is particularly important. Nurses are usually in close contact with patients as long as they are in the hospital. A nurse does not study for as many years as a doctor. however, each must be equally dedicated. Caring for sick persons requires a great deal of patience and concern. Most nurses work long days, and they often must work at odd hours or during the night. Under the supervision （监管) of the head nurse, the nursing staff must provide nursing services on a 24-hour basis and attend to patients’ needs. This responsibility continues around the clock, and so nurses must work in shifts. A shift is a period of duty, usually eight in length. The nurses on the ward rotate their shifts. Some take turns working night duty; others work odd shifts. A nurse must always be alert. She can never afford to be careless. This is true in all nursing situation, but it is especially true in the intensive care unit. Patients under intensive care are critically ill, and they must be monitored at all times. The nurses who do intensive care duty have one of the most demanding jobs in the hospital. Serving as a nurse can be a very rewarding job. But it is not an easy one. Not every person is suited to become a nurse. Only very dedicated people have chosen nursing as a profession. 小题1:The nursing staff ________.
A．are central to the medical staff
B．play an important role in caring for patients
C．can work effectively without physicians
D．are always in close contact with the patients小题2:Why don’t nurses study for as many years as doctors？
A．They don’t treat patients for illness and injury.
B．Most nurses work long days.
C．Caring for sick patients requires patience and concern.
D．They are not dedicated.小题3:Nurses work in shifts because ________.
A．they are careless.
B．nursing services must be provided continuously.
C．they work at night from time to time.
D．a shift is usually eight hours long.小题4:What kind of person is suited to become a nurse？
A．A very careful person.
B．An able person.
C．A very dedicated person.
D．A specially trained person.
Michael Fish may soon be replaced as a weather forecaster by something truly fishier---the shark（鲨鱼). Research by a British biology student suggests that sharks could be used to predict storms. Lauren Smith, 24, is close to completing her study on shark’s ability to sense pressure. If her studies prove the theory, scientists may be able to monitor the behaviour of sharks to predict bad weather. Miss Smith had previously studied the behaviour of lemon sharks in the Bahamas. She then used their close relatives, lesser spotted dogfish, for further research at Aberdeen University. Her work---thought to be the first of its kind to test the pressure theory ---- resulted from the observation that juvenile blacktip sharks off Florida moved into deeper water ahead of a violent storm in 2001. Miss Smith said: “I’ve always been crazy about traveling and diving and this led me to an interest in sharks.” “I was delighted to have been able to research in the area for my degree. I know there’s so much more we need to understand ---- but it certainly opens the way to more research.” It has been discovered that a shark senses pressure using hair cells in its balance system. At the Bimini Shark Lab in the Bahamas, Miss Smith fixed hi-tech sensors to sharks to record pressure and temperature, while also tracking them using GPS （Global Positioning System) technology. In Aberdeen, she was able to study the effects of tidal（潮汐的) and temperature changes on dogfish----none of which were harmed. She also used a special lab which can mimic（模拟) oceanic pressure changes caused by weather fronts. She is due to complete her study and graduate later this year. She says she will be looking for a job which will give her the chance to enrich her experience of shark research. 小题1:The passage is most probably taken from _____.
A．a short-story collection
B．a popular science magazine
C．a research paper
D．a personal diary小题2:What do we learn from the first four paragraph of the passage？
A．Sharks may be used to predict bad weather.
B．Sharks’ behaviour can be controlled.
C．Michael Fish is not qualified for his job.
D．Lauren Smith will become a weather forecaster.小题3:Lauren Smith conducted her research by _______.
A．removing hair cells from a shark’s balance system
B．measuring the air pressure of weather fronts
C．recording sharks’ body temperature
D．monitoring sharks’ reaction to weather changes小题4:What is the passage mainly about？
A．A popular way of forecasting weather.
B．A new research effort in predicting storms.
C．Biologists’ interest in the secrets of sharks.
D．Lauren Smith’s devotion to scientific research.
下列五种反应依次属于（1)某人一吃海鲜就出现严重的腹泻（2)美国有一免疫功能异常的儿童，不能接触任何病原体，少量病菌感染亦可导致严重发病（3)流感病毒侵入人体时，有时可作用于红细胞，使红细胞成为靶细胞，导致体内产生抗红细胞抗体，这种抗体也可对正常红细胞发生作用，引起红细胞裂解（4)人体感染酿脓链球菌后，机体产生的抗体不仅向它发起进攻，也向心脏瓣膜发起进攻（5)当细菌的外毒素进入人体后，体内产生特异性的抗毒素与之结合，使它丧失毒性①正常免疫②自身免疫病③免疫缺陷④过敏反应
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A．②③①④③B．④③②②①C．②①④①③D．④③②①①
下图表示某种特异性免疫某时期的结构，请据图分析并判断下列说法不正确的是
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A．该细胞是效应B细胞，不一定由B细胞增殖、分化产生的B．图中与该物质合成分泌有关的细胞器有②③④C．吸附在某些细胞表面的抗体与过敏原结合，使细胞释放组织胺，组织胺所起的调节作用属于体液调节D．直接利用该细胞进行细胞培养，能产生具有特异性强，性质单一的抗体，称之为单克隆抗体
As my train was delayed for two hours, I had plenty of time to spare. After buying some newspapers to read on the journey, I made my way to the _\_1__ office to collect my heavy suitcase I had _\_2__ there three days before. There were only a few people _\_3___, and I took out my wallet to find the receipt for my case. The receipt didn’t seem to be where I had left it. I ___4__ the contents, and railway tickets, money scraps of paper and photos fell out of it; but no matter how _\_5__ I searched, the receipt was nowhere to be found.
When my turn came, I _\_6__ the situation sorrowfully to the assistant. The man looked at me _\_7__ as if to say that he had _\_8__ this kind of story many times and asked me to _\_9__ the case. I told him that it was an old, brown looking _\_10__ no different from the many cases I could see on the shelves. The assistant then gave me _\_11__ and told me to _\_12__ of the chief contents of the case. If they were _\_13___, he said, I could take the case away. I tried to ___14__ all the articles I had _\_15__ packed into the case and wrote them down as they came to me.
After I had done this, I went to _\_16__ among the shelves. There were hundreds of cases there. For one dreadful moment, it _\_17__ to me that if someone had _\_18__ the receipt up he could have easily claimed（认领) the case already. This hadn’t happened _\_19___, for after a time I found the case lying in a corner. After examining the articles inside, the assistant was ___20__ and told me I could take the case away.
下列免疫反应中，属于体液免疫反应的是
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A．体液中的吞噬细胞吞噬病原体B．免疫球蛋白与病菌结合抑制病菌繁殖C．体液中的可溶性免疫活性物质干扰素抵抗病毒感染D．眼泪中的溶菌酶可破坏侵入人体的细菌