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Health, 23.06.2019 17:30
What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.
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Health, 23.06.2019 23:10
Which of these technological advances has improved flu vaccines? a. ct scans b. cell-based culturing c. egg production d. glucose monitors
Answers: 2
1. What do we call the study of the earth and its structure?...
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