题目内容
（请给出正确答案）
A．it has killed more people
B．it has been found in more countries
C．people know nothing about it
D．people have no immunity to it
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更多“The current swine flu threaten…”相关的问题
According to the passage, what do we know about swine flu？
A) Swine flu can be transmitted easily among pigs but not among people.
B) Symptoms of swine flu are different from those of regular seasonal influenza.
C) People with swine flu often get a stomachache, headache and toothache.
D) Swine flu is a virus that has acquired the ability to pass from person to person.
What can we know about the present epidemic ---swine flu？
A) The genes of the flu virus come from pigs.
B) It will soon spread and cause a pandemic.
C) There has been further change in the genes of the viruses.
D) It is similar to the influenza pandemic of 1918 to 1919.
What do we know about the swine flu virus from the last paragraph？
A．It is not quite sure if it can spread among persons.
B．It is not quite sure how it is transmitted.
C．Surely it is transmitted by sneezing or coughing.
D．Surely it is transmitted by skin contact.
Which of the following is true about the present swine flu viruses？
A．The viruses can infect different species.
B．The genes of the viruses come from pigs.
C．The viruses mix genes from different species.
D．The genes of the viruses were made artificially.
