2007AMC12B, 21  The first $$2007$$ positive integers are each written in base $$3$$. How many of these base- $$3$$ representations are palindromes? (A palindrome is a number that reads the same forward and backward.)．  把前$$2007$$个正整数用$$3$$进制来表示。这些$3$进制表示中有多少是回文数？（回文数，指正着或倒着读都一样的数。）．
选项为:A:$$100$$  B:$$101$$  C:$$102$$  D:$$103$$  E:$$104$$  请回答其中一个选项.