29. Why does the author mention contact tracing in the third paragraph? (A) To illustrate why vaccine development is unnecessary (B) To explain how governments collect economic data (C) To emphasize a major difficulty in controlling the outbreak (D) To show that most infections occur outside Africa

30. Which of the following best expresses the main idea of the passage? (A) Ebola outbreaks can be eliminated solely through medical treatment. (B) International organizations should assume full responsibility for public health emergencies. (C) The current Ebola outbreak highlights the importance of coordinated action, adequate resources, and community cooperation. (D) Previous Ebola outbreaks offer little information that can be applied to current disease-control efforts.

29. Why does the author mention contact tracing in the third paragraph?
(A) To illustrate why vaccine development is unnecessary
(B) To explain how governments collect economic data
(C) To emphasize a major difficulty in controlling the outbreak
(D) To show that most infections occur outside Africa

相關試題

相關試卷

29. Why does the author mention contact tracing in the third paragraph?(A) To illustrate why vaccine development is unnecessary(B) To explain how governments collect economic data(C) To emphasize a major difficulty in controlling the outbreak(D) To show that most infections occur outside Africa

相關試題

相關試卷

29. Why does the author mention contact tracing in the third paragraph?
(A) To illustrate why vaccine development is unnecessary
(B) To explain how governments collect economic data
(C) To emphasize a major difficulty in controlling the outbreak
(D) To show that most infections occur outside Africa