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1. Natural Selection- The process in nature by which, according to Darwin’s theory of evolution, only the organisms best...

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An algebraic expression is a combination of numbers and variables joined by such operations, such as addition, multiplication, or...

- Chlorine (n): nguyên tố Clo
- Dichlorine (n): phân tử Cl2
- Chloric (adj): gặp trong HCl -...

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1. Atom- A unit of matter, the smallest unit of an element, having all the characteristics of that element...

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To add fractions, the denominators must be equal. Complete the following steps to add two fractions.
Build each fraction...

 Not easy for you to tell the difference.

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Methods to obtain coherence include:

Repetition of a key phrase or word
Use of personal pronouns
Use of synonyms
Use of...