2017英语等级考试pets5级阅读理解每日练习七
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2017英语等级考试pets5级阅读理解每日练习七 1. Shortages of flue vaccine show that _______。 [ A ] America relies too much on foreign suppliers [ B ] the demand of flu vaccines is high this year [ C ] quality problem is a serious problem in flu vaccine production [ D ] the supply of flu vaccines is rather weak and America has no back-up measures to make it up 2. The word "cleared" ( Line 4, Paragraph 3 ) might mean _______。 [ A ] permitted [ B ] removed [ C ] proved [ D ] produced 3. Private companies have little interest in producing flu vaccines because of _______。 [ A ] complicated process, high cost, low profit and high risk [ B ] shortages of fertilized chicken eggs [ C ] difficulty in growing live virus [ D ] fast changing of flu virus 4. From the last paragraph we can infer that _______。 [ A ] the government hopes to solve the problem by way of volunteer restrictions [ B ] more than 47 million Americans who are qualified to get flu vaccine shots can not get them this year [ C ] America has to deal with a limited supply of flu vaccines this year [ D ] normally only a small percentage of American population gets flu vaccine shots each year 5. 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. 相关资料 |
