单项选择题It can be inferred from the passage that the virus is transmitted from chimps in Cameroon to humans most probably through
单项选择题In the author’s opinion, which of the following is NOT the success we’ve achieved in the effort to fight against terrorist attack
单项选择题At the end of the story, the author implies that
单项选择题According to the passage, HIV is spread through all the following EXCEPT
单项选择题As implied by the interviewer, the remarks by Miss Chan’s referee possibly mean that