题目内容
（请给出正确答案）
A．provide a good match between the vaccine and the virus strains
B．save the expense in producing and distributing the vaccine
C．reduce the frequency the flu viruses change from one strain to another
D．leave time to manufacture and distribute vaccines before the flu season
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更多“According to Paragraph 5, the …”相关的问题
The sentence "They are free to listen to and live by their circadian rhythms." (In Paragraph 4) probably means ______.
A．They can lead their daily lives according to their biological clocks, without referring to a man-made clock.
B．They can listen to the wonderful rhythms of the biological clock and live close to them.
C．They can live by regulating their own circadian rhythms.
D．They are free from the annoying rhythms of everyday life.
What does the author intend to demonstrate with "office hours" adopted by the old (Paragraph 2) ？
A．A type of enforced systems.
B．A symbol for human initiatives.
C．A sort of freedom deprivation.
D．A token for the old' obsoleteness.
【填空题】![【填空题】[图]Fill in the blanks according to the pa...【](http://static.jiandati.com/1ae9caa-chaoxing2016-799371.png)
Fill in the blanks according to the passages.![【填空题】[图]Fill in the blanks according to the pa...【](http://static.jiandati.com/f7f77a8-chaoxing2016-799445.png)
A、According to how much time he has worked.
B、According to the level of output.
C、According to how many items are sold.
D、According to how many clients are contacted.
According to the text, Beth replied to the writer______.
A．uncooperatively
B．sympathetically
C．considerately
D．impatiently
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