In 2013, the population of China is about （） more than that of America.

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• （）people has the largest population of minority ethnic groups with more than 16 million in China.
• 英译汉：It is estimated that around 2.8 billion people — nearly percent of the world’s population — use social media regularly.
• 具有相同性质或属性的个体所组成的集合称为总体(population)，它是指研究对象的全体。
• The test for the equality of two population variances is based on the
• A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability th