Which of the following is a disease? The second paragraph suggests that what has been discovered about immune system can be use

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问题 Which of the following is a disease?
The second paragraph suggests that what has been discovered about immune system can be used______.

选项 A、to strengthen immune system’s capacity to fight pathogens.
B、to create immune system with allergies.
C、to interpretate the data contained in immune system.
D、to find out how cancers fight immune system.

答案D

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