DLE患者皮损处狼疮带试验阳性率为()
A.30%~50%
B.50%~70%
C.70%~90%
D.90%以上
参考答案:C
—When did you buy the computer?
—I have ______ this computer for 5 years, but it still works well.[ ]
A. bought
B. have
C. had
应行哪项生化检查最有诊断意义
A.AFP
B.四环素荧光试验
C.尿唾液酸
D.血癌胚抗原
E.细胞学检查