题目

英语翻译
A positive integer is called a perfect power if it can be written in the form a^b (a的b次方),where a and b are positive integers with b>=(大于或等于).for example,32 and 125 are perfect powers because 32=2^5 and 125=5^3
The increasing sequence
2,3,5,6,7,10,.
consists of all positive integers which are not perfect powers.the sum of the digits of the 1000th number in this sequence is
(A)50 (B)48 (C)52 (D)54 (E)56
我在国外读书..中国人出的?

提问时间：2021-01-19

答案