(95)有助于排除肾衰竭，而支持脱水诊断的指标是
A.尿比重↑，血浆比重↓
B.尿比重↓，血浆比重↑
C.尿比重↓，血浆比重↓
D.尿比重↑，血浆比重↑
E.尿比重↓，血浆比重正常