According to the passage, which of the following is TRUE? -考呗网

公共英语五级

单选题 According to the passage, which of the following is TRUE?

A．All Americans are persuaded not to get vaccinated this year.
B．The big problem in innovating flu vaccine producing technique is how to grow virus in a new way.
C．More flu vaccines can not be produced in a short time because private companies refuse to produce more.
D．Flu vaccines are easier than most vaccines to produce through cell cultures.

参考答案：B进入在线模考

B 【解析】由第一段的“Instead of beseeching us all to get vaccinated．they’re now urging most healthy people between the ages of 2 and 64 not to．”可以判断出美国之呼吁2至64岁的健康人不接种流感疫苗，而不是所有的美国人，因此答案A是错误的。从第二段最后一句话可以看出疫苗生产厂家无法临时增加疫苗生产不是由于他们不愿意，而是由于受精鸡蛋的生产已经预先计划好，无法提供更多的受精鸡蛋，由此可见答案C是错误的。从第三段第三行“Flu vaccines ale harder than most to produce this way”可以判断出答案D是错误的，因为流感疫苗比别的疫苗更难用细菌培育的方式生产。而由第三段第2—3行“The main challenge is to shift production from eggs into cell cultures——a medium already used to make most other vaccines．”以及上一句可见，改造疫苗生产工艺的关键在于革新病毒培育技术。因此正确答案为B。

你可能感兴趣的试题

1根据下面资料，回答题
The press is constantly reminding us that the dramatic increase in the age of our population over the next 30 or so years will cause national healthcare systems to collapse, economies to crumple under the strain of pension de- mands and disintegrating families to buckle under increasing care commitments. Yet research at Oxford is beginning
to expose some of the widespread myths that underlie this rhetoric. Demographic ageing is undoubtedly a reality. Life expectancy in developed counties has risen continuously over the past century, increasing the percentage of those over the age of 60 relative to those under the age of 15. By 2030 half the population of Western Europe will be over the age of 50, with a predicted average life expectancy of a further 40 years. By then, a quarter of the popula- tion will be over 65 and by 2050 the UK' s current number of 10, 000 centenarians are predicted to have reached a quarter of a million. Some demographers have even suggested that half of all baby girls born in the West today will live to see the next century.
66______________________________________________________________________
Indeed, if this could be achieved throughout the world, it would surely count as the success of civilization, for then we would also have conquered the killers of poverty, disease, famine and war.
Decreasing mortality rates, increasing longevity and declining fertility mean smaller percentages of young people within populations. Over the past 20 years life expectancy at birth in the UK has risen by four years for men ( to 75) and three years for women ( to 80). Meanwhile fertility rates across Europe have declined more or less continuously over the past 40 years and remain well below the levels required for European populations to be able to replace them- selves without substantive immigration. But again, rather than seeing this as a doom and gloom scenario, we need to explore the positive aspects of these demographics. The next 50 years should provide us with an opportunity to enjoy the many advanta~,es of a society with a mature oooulaticn structure.
67______________________________________________________________________
The first of these is the current political rhetoric which claims that health services across the Western world are collapsing under the strain of demographic ageing.
68_____________________________________________________________________
The second myth is the view that the ratio of workers to non-workers will become so acute that Western econo- mies will collapse, compounded by a massive growth in pension debt. While there are undoubted concerns over cur- rent pension shortfalls, it is also clear that working lives will themselves change over the next few decades, with a predicted increase in flexible and part-time work and the probable extension of working life until the age of 70. In- deed, we have to recognize that we cannot expect to retire at the age of 50 and then be able to support ourselves for another 40 or so years. Neither a solid pension scheme nor savings can carry people that long.
69_____________________________________________________________________
A further myth is that we will all live in loose, multigenerational families, experiencing increased emotional distancing from our kin. Evidence from a variety of studies across the developed world suggests that, if anything, the modern family is actually becoming more close-knit. Work carried out by the Oxford Institute in Scandinavia and in a Pan-European Family Care Study, for example, shows that despite the influence of the welfare state, over the past 10 yearn, people have come to value family relationships more than previously.
70_____________________________________________________________________
In the developed world, therefore, we can see actual benefits from population ageing: a better balance between age groups, mature and less volatile societies, with an emphasis on age integration. The issues will be very different in other parts of the world.
Herein lies another myth: that the less developed world will escape from demographic ageing. Instead, the mas- sive increase in the age of populations facing these countries-predicted to be up to one billion older people within 30 years--is potentially devastating. The problem is not only that demographic ageing is occurring at a far greater pace than we have seen in Western nations, but also that few if any developing countries have the economic development and infrastructure necessary to provide widespread public pensions and healthcare to these growing elderly populations.
As a result, older people are among the poorest in every developing country. They have the lowest levds of in- come, education and literacy, they lack savings and assets, have only limited access to work, and even in times of crisis are usually the last to be cared for under emergency aid programmes. Perhaps of most concern is healthcare,for as we conquer acute diseases, we are going to see a rapid increase in levels of chronic illness and disability, butno long-term care programmes or facilities to tackle this.
A.Since it is likely that a longer active working life will coincide with a predicted labor shortage resulting from a lack of younger workers, we need to provide the opportunities and training to encourage older men and women to remain economically productive. Our studies show that there are benefits from having an age-in-tegrated workforce. It is another myth that older workers are less productive than younger ones. In fact, thecombined energy of younger workers with the experience of older ones can lead to increased productivity--something from which young and old alike will benefit.
B. In 2001, in recognition of the significance of these demographic changes and the global challenges and opportunities that will accompany them, the Oxford Institute of Ageing was established at the University. It is made up of researchers in demography, sociology, economics, social anthropology, philosophy and psychology, with links to other specialists in medicine, biology, law and policy in research units across the U-
niversity. This cross-disciplinary approach has made it possible to challenge some of the most pervasive myths about ageing societies.
C. As Institute healthcare ethicist Kenneth Howse points out, family obligations towards older relatives may change over the next 20 years, but current indications are that families are retaining a strong responsibility to care. Furthermore, as societies age, the contributory role of older people as grandparents becomes more important. Work by Institute researchers on another European Union study on multi-generational families has highlighted the role that grandparents play by freeing up the responsibilities of the younger reproductive population.
D. It is clear that the changing demographic landscape poses challenges for the future. The necessity now is to develop appropriate economic, social and political structures to take advantage of the opportunities that mature societies will bring, while ensuring that there are appropriate safety nets for those left vulnerable within these populations--which will include both young and old alike.
E. Rather than fearing such a future, however, we should see this trend as a great success. It must undoubtedly
be a major achievement of civilization that most individuals within a society can expect to enjoy a long and healthy lifespan.
F. George Leeson, a demographer at the Institute, points out that while a number of cross-national studies have considered the determinants of spiraling healthcare costs, only one has found the explanatory factor to be the proportion of the population aged 65 and over. Rather, it is growth in income, lifestyle characteristics and environmental factors such as technology and drugs that are driving up healthcare costs. In addition, the costs are shifting between population groups. The key here, he adds, is to develop sufficiently flexible health service structures to shift not only economic resources but also personnel.
第（66）题

点击查看答案进入在线模考

2第（67）题

点击查看答案进入在线模考

3第（68）题

点击查看答案进入在线模考