下列风湿性疾病中抗dsDNA抗体阳性率最高的是
A．类风湿性关节炎B．骨关节炎C．硬皮病D．系统性红斑狼疮E．皮肌炎
参考答案：D
He promised to come but he didn’t _______until the meeting came to an end, which made me angry.
A．turn in
B．turn down
C．turn up
D．turn away
紫外线灭菌法中灭菌力最强的波长是
A．250nmB．251nmC．252nmD．253nmE．254nm
