21. What is the main idea of the passage?
A) A new computer chip. B) Electric charges make miracle.
C) The development of innovative technologies. D) Auspicious conditions in medical technologies.
22. What does the word COMBAT in the text mean?
A) overcome B) escape C) avoid D) prevent
23. All of the following statements are FALSE EXCEPT:
A) Electric shot can do harm to a person.
B) Electric charges make cells to cooperate.
C) Cells could be controlled by electric impulses.
D) Only the cells of brain, bone and muscle can be controlled by impulses.
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