This passage ______.
A: concerns the damaging effects of influenza
B: mentions the steps of fighting against the harmful effects of influenza
C: emphasizes the worry expressed by all age groups
D: both A and B
A: concerns the damaging effects of influenza
B: mentions the steps of fighting against the harmful effects of influenza
C: emphasizes the worry expressed by all age groups
D: both A and B
举一反三
- Which of the following is wrong about influenza prevention A: Vaccination before influenza B: Giving amantadine to all susceptible people before influenza epidemic C: isolation and treatment of influenza patients D: reduction of public gatherings
- It can be inferred from the passage that all of the following are ways of producing new strains of influenza viruses EXCEPT _____.
- The author seems, in the last paragraph of this passage, ______. A: to alarm us against the terrible effects of acid rain B: to suggest that there are some ways to solve the problem C: to urge us to pass alternative stricter laws on pollution D: to remove the effects of acid rain from all around us
- According to the passage, scientists have discovered that influenza viruses_____.
- The bacteria pneumonia may complicate influenza at both extremes of age.