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Question 15 of 26
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21. Tooth decay
22. A constant, low level of fluoride in the mouth
23. Drinking water
24. Acute fluoride poisoning
A is the way most people around the world get fluoride. B is a threat to public safety. C can occur as a result of mishaps in adding fluoride to water. D can be regarded as nutritious. E is a widespread health issue in developed countries. F is not as common in infants. G is the best protection against tooth decay.H is required to sustain our material survival and biological growth. I is difficult to achieve amongst poorer people.
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A Dr. Svetlana Balabanova
B Dr. Michelle Lescot
C Professor John Baines
D Professor Martin Bernal
30 first to find a substance from the Americas in a mummy
31 argues against transoceanic trade because of lack of evidence
32 had to defend against attacks on research methodology
33 gives evidence of extensive Egyptian trade in ancient times
34 publication of research results was controversial