Passage2 Questions 19 to 21 are based on the passage you have just
heard.
A: Strengthening people's immunity to infection.
B: Better understanding patients' immune system.
C: Helping improve old people's health conditions.
D: Further reducing old patients' medical expenses.
heard.
A: Strengthening people's immunity to infection.
B: Better understanding patients' immune system.
C: Helping improve old people's health conditions.
D: Further reducing old patients' medical expenses.
举一反三
- Questions 19 to 21 are based on the passage you have just heard.19. A: The function of the human immune system. B: The cause of various auto-immune diseases. C: The viruses that may infect the human immune system. D: The change in people’s immune system as they get older.
- Questions 19 to 21 are based on the passage you have just heard. What are some people worried about according to the speaker？
- Passage 2[br][/br] Questions 19 to 21 are based on the passage you have just heard. A: 38%. B: 25%. C: 36%. D: 21%.
- Questions 19 to 21 are based on the passage you have just heard. 19.
- Passage 2[br][/br] Questions 19 to 21 are based on the passage you have just heard. A: It is inappropriate. B: It should be banned. C: It brings fun to work. D: It improves efficiency.