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Anonymous Posted 9 years ago
Grammar

A or an

an RPMI-1640 medium


a RPMI-1640 medium

  

Top answer

an RPMI, because the letter R is pronounce 'are'.

  • an RPMI, because the letter R is pronounce 'are'.
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1 Answers
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an RPMI, because the letter R is pronounce 'are'.

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