[計量] 請教一題計量
In a certain country, a person is born every 3 seconds and a person dies every
10 seconds. Therefore, the birth and death rates account for a population
growth rate of one person every
(A) 3 1/3 seconds
(B) 4 2/7 seconds
(C) 7 seconds
(D) 11 2/3 seconds
(E) 13 seconds
答案為 B
麻煩各位了 謝謝^^
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