Question

如果一個(gè)有理數(shù)的絕對(duì)值等于它本身，那么這個(gè)數(shù)一定是（　�。�

A．負(fù)數(shù)

B．負(fù)數(shù)和0

C．正數(shù)和0

D．正數(shù)

Answer 1

分析：根據(jù)絕對(duì)值的性質(zhì)解答．

解答：解：如果一個(gè)有理數(shù)的絕對(duì)值等于它本身，那么這個(gè)數(shù)一定是正數(shù)和0．
故選C．

點(diǎn)評(píng)：本題考查了絕對(duì)值的性質(zhì)，一個(gè)正數(shù)的絕對(duì)值是它本身；一個(gè)負(fù)數(shù)的絕對(duì)值是它的相反數(shù)；0的絕對(duì)值是0．