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1、2023年广东公共英语考试真题卷（5）本卷共分为1大题50小题，作答时间为180分钟，总分100分，60分及格。一、单项选择题（共50题，每题2分。每题的备选项中，只有一个最符合题意） 1.The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 inciden
2、ts that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, radio and cassette players and mobile telephones. RTCA, an organization whi
3、ch advises the aviation industry, has recommended that all airlines ban such devices from being used during critical stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to
4、 individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights. The difficulty is predicting how electromagnetic fields might affect an aircr
5、afts computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be danger
6、ous or not. The fact that aircraft may be vulnerable to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment. As a result, loud music sound makes the passenger unable to hear the instructions turning off his radio, this is the most worrying thing
7、s to airlines.Few airlines want to impose a total ban on their passengers using electronic devices because _.Athey have other effective safety measures to fall back onBthe harmful effect of electromagnetic interference is yet to be provedCmost passengers refuse to take a plane which bans the use of
8、radio and cassette playersDthey dont believe there is such a danger as radio interference 2.Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins researchers said on Wednesday. The scientists said their study is the first to show that
9、 the central nervous system, reacting to environmental changes, may spark changes in the bodys immune system that control the growth of tumors. They said if that is the ease, a better understanding of how the process works eventually could lead to new cancer treatments. Dr. Randy Nelson, an associat
10、e professor of psychology at Hopkins, stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day, the animals immune system and cancer. More work also would be needed to show that the findings could be applied to huma
11、n cancer. Dr. Faye Austin, an immunologist with the National Cancer Institute in Bethesda, said: Its a very intriguing observation that the length of exposure to light can affect the growth of a tumour. But I think that the draws really need further work to clarify the mechanics. But Austin said the
12、 findings were surprising and important, only because they open up a new approach for research. Studies showed that stress weakened the immune system in animals. They figured that because winter is stressful, the season probably causes exertion (影响) on the immune system. The researchers reasoned tha
13、t animals that compensated by boosting (促进) their immune systems as winter approached would have a better chance of surviving and producing offspring. In the same way that animals have evolved to select the best time to breed, it struck me that animals ought to be able to predict when conditions wou
14、ld be challenging immunologically. Nelson said.Animals can strengthen their immune system in preparation for winter because _.Awhen season changes, the central nervous system reacts to environment and that sparks changes in the bodys immune systemBanimals have shorter exposure to light in winter tha
15、n in summerCanimals have evolved to select the best time to breed and be able to predict the change of conditionsDall of the above 3.Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins researchers said on Wednesday. The scientists s
16、aid their study is the first to show that the central nervous system, reacting to environmental changes, may spark changes in the bodys immune system that control the growth of tumors. They said if that is the ease, a better understanding of how the process works eventually could lead to new cancer
17、treatments. Dr. Randy Nelson, an associate professor of psychology at Hopkins, stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day, the animals immune system and cancer. More work also would be needed to show t
18、hat the findings could be applied to human cancer. Dr. Faye Austin, an immunologist with the National Cancer Institute in Bethesda, said: Its a very intriguing observation that the length of exposure to light can affect the growth of a tumour. But I think that the draws really need further work to c
19、larify the mechanics. But Austin said the findings were surprising and important, only because they open up a new approach for research. Studies showed that stress weakened the immune system in animals. They figured that because winter is stressful, the season probably causes exertion (影响) on the im
20、mune system. The researchers reasoned that animals that compensated by boosting (促进) their immune systems as winter approached would have a better chance of surviving and producing offspring. In the same way that animals have evolved to select the best time to breed, it struck me that animals ought
21、to be able to predict when conditions would be challenging immunologically. Nelson said.Which statement can be the best title for this articleADr. Randy Nelson and His New Findings.BAnimals Resistance to Cancer.CWinter and Animals Immune System.DA Light in the Cancer Darkness. 4.The biggest safety t
22、hreat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed
23、, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation industry, has recommended that all airlines ban such devices from being used during critica
24、l stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and
25、landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights. The difficulty is predicting how electromagnetic fields might affect an aircrafts computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft us
26、e for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not. The fact that aircraft may be vulnerable to interference raises the risk that terrorists may use radio
27、systems in order to damage navigation equipment. As a result, loud music sound makes the passenger unable to hear the instructions turning off his radio, this is the most worrying things to airlines.Why is it difficult to predict the possible effects of electromagnetic fields on an airplanes compute
28、rsABecause it is extremely dangerous to conduct such research on an airplane.BBecause experts lack adequate equipment to do such research.CBecause research scientists have not been able to produce the same effects in labs.DBecause it remains a mystery what wavelengths are liable to be interfered wit
29、h. 5.Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment
30、endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation (辐射) from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do preven
31、t a lot of radiation damage. Radiation is the greatest known danger to explorers in space. The unit of radiation is called rem. Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is t
32、hat it is extremely difficult to be sure about radiation damagea person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross b
33、elts of high radiation and, during the outward and return journeys, the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in space laboratory. Rugs might help to decrease the
34、 damage done by radiation, but no really effective ones have been found so far.The best title for this passage would be _.AResearch on RadiationBEffects of Space RadiationCImportance of Protection against RadiationDThe Atmosphere and Our Environment 6.The biggest safety threat facing airlines today
35、may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts
36、are pointing the blame at portable electronic devices such as portable computers, radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation industry, has recommended that all airlines ban such devices from being used during critical stages of flight, particul
37、arly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant
38、to enforce a total ban, given that many passengers want to work during flights. The difficulty is predicting how electromagnetic fields might affect an aircrafts computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communi
39、cation. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not. The fact that aircraft may be vulnerable to interference raises the risk that terrorists may use radio systems in order to damage n
40、avigation equipment. As a result, loud music sound makes the passenger unable to hear the instructions turning off his radio, this is the most worrying things to airlines.It can be inferred from the passage that the author _.Ais in favor of prohibiting passengers use of electronic devices completely
41、Bregards it as unreasonable to exercise a total ban during flightChasnt formed his own opinion on this problemDhas overestimated the danger of electromagnetic interference 7.BPart A/BI You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the co
42、rrect answer - A,B,C or D, and mark it in your test booklet. You will have5 seconds to answer the question and you will hear each dialogue ONLY ONCE. Now look at Question 1./IWhat does the woman think of the priceAReasonable.BCheap.CExpensive.DUnacceptable. 8.BPart A/BI You will hear 10 short dialog
43、ues. For each dialogue, there is one question and four possible answers. Choose the correct answer - A,B,C or D, and mark it in your test booklet. You will have5 seconds to answer the question and you will hear each dialogue ONLY ONCE. Now look at Question 1./IWhat will the speakers doAHave dinner.B
44、Go to the laboratory.CHave classes.DGo shopping. 9.BPart A/BI You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer - A,B,C or D, and mark it in your test booklet. You will have5 seconds to answer the question and you will hea
45、r each dialogue ONLY ONCE. Now look at Question 1./IWhat does the man ask the woman to doASend a note to Professor Johnson.BWait a minute to see Professor Johnson.CWrite a note to Professor Johnson.DListen to Professor Johnsons speech. 10.BPart A/BI You will hear 10 short dialogues. For each dialogu
46、e, there is one question and four possible answers. Choose the correct answer - A,B,C or D, and mark it in your test booklet. You will have5 seconds to answer the question and you will hear each dialogue ONLY ONCE. Now look at Question 1./IWhy cant the man ring the womanAHe doesnt have a telephone.B
47、His telephone was stolen.CHis telephone doesnt work.DHe doesnt have time. 11.BPart A/BI You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer - A,B,C or D, and mark it in your test booklet. You will have5 seconds to answer the
48、 question and you will hear each dialogue ONLY ONCE. Now look at Question 1./IWhat is the possible relationship between the speakersASalesman and customer.BPost office clerk and customer.CTeacher and student.DRailway station clerk and passenger. 12.What are the two speakers talking aboutAPlans for the weekend.