理工类单选集_考试卷模拟考试题_3

1、姓名：_ 班级：_ 学号：_-密-封 -线- 理工类单选集_考试卷模拟考试题考试时间：120分钟 考试总分：100分题号一二三四五总分分数遵守考场纪律，维护知识尊严，杜绝违纪行为，确保考试结果公正。1、cell phones increase traffic, pedestrian fatalitiescell phones are a danger on the road in more ways than one. two new studies show that talking on the phone while traveling, whether youre driving or

2、 on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers.the new studies, lead-authored by rutgers university, newark, economics professor peter d loeb, relate the impact of cell phones on accident fatalit

3、ies to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. however, this reduction in fatalities disappeared once the numbers of phones in use reache

4、d a “critical mass” of 100 million, the study found.these studies looked at cell phone use and motor vehicle accidents from 1975 through 2002, and factored in a number of variables, including vehicle speed, alcohol consumption, seat belt use, and miles driven. the studies found the cell phone-fatali

5、ty correlation to be true even when including factors such as speed, alcohol consumption, and seat belt use.loeb and his co-author determined that, at the current time, cell phone use has a “significant adverse effect on pedestrian safety” and that “cell phones and their usage above a critical thres

6、holds adds to motor vehicle fatalities.” in the late 1980s and part of the 1990s, before the numbers of phones exploded, cell phone use actually had a “life-saving effect” in pedestrian and traffic accidents, loeb notes. “cell-phone users were able to quickly call for medical assistance when involve

7、d in an accident. this quick medical response actually reduced the number of traffic deaths for a time,” loeb hypothesizes.however, this was not the case when cells were first used in the mid-1980s, when they caused a “life-taking effect” among pedestrians, drivers and passengers in vehicles. in tho

8、se early days, when there were fewer than a million phones, fatalities increased, says loeb, because drivers and pedestrians probably were still adjusting to the novelty of using them, and there werent enough cell phones in use to make a difference in summoning help following an accident, he explain

9、s.the “life-saving effect” occurred as the volume of phones grew into the early 1990s, and increasing numbers of cells were used to call 911 following accidents, leading to a drop in fatalities, explains loeb. but this life-saving effect was canceled out once the numbers of phones reached a “critica

10、l mass” of about 100 million and the “life-taking effect” increased accidents and fatalities outweighed the benefits of quick access to 911 services, according to loeb.loeb and his co-authors used econometric models to analyze data from a number of government and private studies. he and his co-autho

11、rs recommend that governments consider more aggressive policies to reduce cell phone use by both drivers and pedestrians, to reduce the number of fatalities.the two new studies, lead-authored by professor peter d loeb_. （ ）a.show that talking on the phone while driving or walking in the street incre

12、ases deaths of drivers and pedestriansb.show that talking on the phone while driving increases pedestrian deathsc.recommend that strict measures be taken to restrain cell phone used.both a and c2、cell phones increase traffic, pedestrian fatalitiescell phones are a danger on the road in more ways tha

13、n one. two new studies show that talking on the phone while traveling, whether youre driving or on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers.the new studies, lead-authored by rutgers university,

14、 newark, economics professor peter d loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalit

15、ies. however, this reduction in fatalities disappeared once the numbers of phones in use reached a “critical mass” of 100 million, the study found.these studies looked at cell phone use and motor vehicle accidents from 1975 through 2002, and factored in a number of variables, including vehicle speed

16、, alcohol consumption, seat belt use, and miles driven. the studies found the cell phone-fatality correlation to be true even when including factors such as speed, alcohol consumption, and seat belt use.loeb and his co-author determined that, at the current time, cell phone use has a “significant ad

17、verse effect on pedestrian safety” and that “cell phones and their usage above a critical thresholds adds to motor vehicle fatalities.” in the late 1980s and part of the 1990s, before the numbers of phones exploded, cell phone use actually had a “life-saving effect” in pedestrian and traffic acciden

18、ts, loeb notes. “cell-phone users were able to quickly call for medical assistance when involved in an accident. this quick medical response actually reduced the number of traffic deaths for a time,” loeb hypothesizes.however, this was not the case when cells were first used in the mid-1980s, when t

19、hey caused a “life-taking effect” among pedestrians, drivers and passengers in vehicles. in those early days, when there were fewer than a million phones, fatalities increased, says loeb, because drivers and pedestrians probably were still adjusting to the novelty of using them, and there werent eno

20、ugh cell phones in use to make a difference in summoning help following an accident, he explains.the “life-saving effect” occurred as the volume of phones grew into the early 1990s, and increasing numbers of cells were used to call 911 following accidents, leading to a drop in fatalities, explains l

21、oeb. but this life-saving effect was canceled out once the numbers of phones reached a “critical mass” of about 100 million and the “life-taking effect” increased accidents and fatalities outweighed the benefits of quick access to 911 services, according to loeb.loeb and his co-authors used economet

22、ric models to analyze data from a number of government and private studies. he and his co-authors recommend that governments consider more aggressive policies to reduce cell phone use by both drivers and pedestrians, to reduce the number of fatalities.according to the second paragraph, when did cell

23、 phones actually help to reduce pedestrian and traffic fatalities （ ）a.right after cell phones were invented.b.before the number of cell phone users reached a critical massc.when cell phone users totaled to a certain number.d.when the number of cell phones decreased to a certain number.3、cell phones

24、 increase traffic, pedestrian fatalitiescell phones are a danger on the road in more ways than one. two new studies show that talking on the phone while traveling, whether youre driving or on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on c

25、ell use by both pedestrians and drivers.the new studies, lead-authored by rutgers university, newark, economics professor peter d loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone u

26、se follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. however, this reduction in fatalities disappeared once the numbers of phones in use reached a “critical mass” of 100 million, the study found.these studies looked at cell phone use and motor vehicle acc

27、idents from 1975 through 2002, and factored in a number of variables, including vehicle speed, alcohol consumption, seat belt use, and miles driven. the studies found the cell phone-fatality correlation to be true even when including factors such as speed, alcohol consumption, and seat belt use.loeb

28、 and his co-author determined that, at the current time, cell phone use has a “significant adverse effect on pedestrian safety” and that “cell phones and their usage above a critical thresholds adds to motor vehicle fatalities.” in the late 1980s and part of the 1990s, before the numbers of phones e

29、xploded, cell phone use actually had a “life-saving effect” in pedestrian and traffic accidents, loeb notes. “cell-phone users were able to quickly call for medical assistance when involved in an accident. this quick medical response actually reduced the number of traffic deaths for a time,” loeb hy

30、pothesizes.however, this was not the case when cells were first used in the mid-1980s, when they caused a “life-taking effect” among pedestrians, drivers and passengers in vehicles. in those early days, when there were fewer than a million phones, fatalities increased, says loeb, because drivers and

31、 pedestrians probably were still adjusting to the novelty of using them, and there werent enough cell phones in use to make a difference in summoning help following an accident, he explains.the “life-saving effect” occurred as the volume of phones grew into the early 1990s, and increasing numbers of

32、 cells were used to call 911 following accidents, leading to a drop in fatalities, explains loeb. but this life-saving effect was canceled out once the numbers of phones reached a “critical mass” of about 100 million and the “life-taking effect” increased accidents and fatalities outweighed the bene

33、fits of quick access to 911 services, according to loeb.loeb and his co-authors used econometric models to analyze data from a number of government and private studies. he and his co-authors recommend that governments consider more aggressive policies to reduce cell phone use by both drivers and ped

34、estrians, to reduce the number of fatalities.what is said about cell phone use in paragraph 4 （ ）a.the number of cell phones in use exploded in the late 1980s and part of the 1990s.b.the number of traffic deaths was reduced in the late 1980s and part of the 1990s due to cell phone use.c.cell phone u

35、sers are likely to be involved in traffic accidents.d.the use of cell phones has a life-saving effect for pedestrians and drivers.4、cell phones increase traffic, pedestrian fatalitiescell phones are a danger on the road in more ways than one. two new studies show that talking on the phone while trav

36、eling, whether youre driving or on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers.the new studies, lead-authored by rutgers university, newark, economics professor peter d loeb, relate the impact of

37、cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. however, this reduction in fatalities disappeared once the

38、numbers of phones in use reached a “critical mass” of 100 million, the study found.these studies looked at cell phone use and motor vehicle accidents from 1975 through 2002, and factored in a number of variables, including vehicle speed, alcohol consumption, seat belt use, and miles driven. the stud

39、ies found the cell phone-fatality correlation to be true even when including factors such as speed, alcohol consumption, and seat belt use.loeb and his co-author determined that, at the current time, cell phone use has a “significant adverse effect on pedestrian safety” and that “cell phones and the

40、ir usage above a critical thresholds adds to motor vehicle fatalities.” in the late 1980s and part of the 1990s, before the numbers of phones exploded, cell phone use actually had a “life-saving effect” in pedestrian and traffic accidents, loeb notes. “cell-phone users were able to quickly call for

41、medical assistance when involved in an accident. this quick medical response actually reduced the number of traffic deaths for a time,” loeb hypothesizes.however, this was not the case when cells were first used in the mid-1980s, when they caused a “life-taking effect” among pedestrians, drivers and

42、 passengers in vehicles. in those early days, when there were fewer than a million phones, fatalities increased, says loeb, because drivers and pedestrians probably were still adjusting to the novelty of using them, and there werent enough cell phones in use to make a difference in summoning help fo

43、llowing an accident, he explains.the “life-saving effect” occurred as the volume of phones grew into the early 1990s, and increasing numbers of cells were used to call 911 following accidents, leading to a drop in fatalities, explains loeb. but this life-saving effect was canceled out once the numbe

44、rs of phones reached a “critical mass” of about 100 million and the “life-taking effect” increased accidents and fatalities outweighed the benefits of quick access to 911 services, according to loeb.loeb and his co-authors used econometric models to analyze data from a number of government and priva

45、te studies. he and his co-authors recommend that governments consider more aggressive policies to reduce cell phone use by both drivers and pedestrians, to reduce the number of fatalities.what is said about cell phone use in the mid-1980s in paragraph 5 （ ）a.it had a life-taking effect because there

46、 werent enough cell phones in use then.b.the increased use of cell phones then caused a “life-taking effect.”c.traffic fatalities increased then because the number of cell phones in use decreased.d.traffic fatalities decreased then because the number of cell phones in use increase5、cell phones incre

47、ase traffic, pedestrian fatalitiescell phones are a danger on the road in more ways than one. two new studies show that talking on the phone while traveling, whether youre driving or on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell us

48、e by both pedestrians and drivers.the new studies, lead-authored by rutgers university, newark, economics professor peter d loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone use fol

49、lows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. however, this reduction in fatalities disappeared once the numbers of phones in use reached a “critical mass” of 100 million, the study found.these studies looked at cell phone use and motor vehicle accidents

50、 from 1975 through 2002, and factored in a number of variables, including vehicle speed, alcohol consumption, seat belt use, and miles driven. the studies found the cell phone-fatality correlation to be true even when including factors such as speed, alcohol consumption, and seat belt use.loeb and h

51、is co-author determined that, at the current time, cell phone use has a “significant adverse effect on pedestrian safety” and that “cell phones and their usage above a critical thresholds adds to motor vehicle fatalities.” in the late 1980s and part of the 1990s, before the numbers of phones exploded, cell phone use actually had a “life-saving effect” in pedestrian and traffic accidents, loeb notes. “cell-phone users were able to quickly call for medical assistance when involved in an accident. this qu