单项选择题
设a>b>0,下列不等式成立的是( ).
A.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/39a61e31dd4f4d87a45bf73bab55f432/8f61f5fe-8793-4872-a8db-43386acf5c5f.jpg">
B.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/39a61e31dd4f4d87a45bf73bab55f432/5df34921-5b2a-466d-9192-269d89fd4b5d.jpg">
C.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/39a61e31dd4f4d87a45bf73bab55f432/93eabae3-cff2-473f-9320-0aefc5eb0b02.jpg">
D.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/39a61e31dd4f4d87a45bf73bab55f432/f029910d-17b5-413f-bed3-15c545467d1f.jpg">