[误] How many population has Canada?

[正] What is the population of Canada?

注：“人口”的英文 population 是不加“s”而构成复数的，所以不能用 many，但有时可以加不定冠词，如 India has a very large population for its area.(印度以面积来说人口是很多的。)这个 population 当然也作单数用，如 Population sinks.(人中降低。)通常用作集合名词，不加“s”构成复数，除非是下列情形：the educated pupulations of China and Japan(中日两国的知识阶层)。