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Video Quiz Course 44K views What is Pi Used For? The constant pi is used in a number of mathematical calculations. The formula for pi is: {eq}\pi = \frac{C}{D} {/eq} where {eq}C {/eq} is the circumference and {eq}D {/eq} is the diameter of any circle. {eq}D=2r ...
【题目】CReading for pleasure is declining amongprimary-age pupils, and increasing numbers of"time poor" parents are dropping the practice of sharing bedtime stories with their children once they start school.Research presented to a conference last week found that, while parents read to preschoolers...