采用机械密封时,产生泄漏可能性有()个密封点。
A.1
B.2
C.3
D.4
参考答案:D
患者,女性,34岁,间歇性发热、纳差,体温37.6~39.2℃,伴腕膝关节酸痛1月余。体检:头发稀少,口腔有溃疡灶,左膝及右腕关节局部红肿,压痛明显,但无畸形。实验室检查:尿蛋白(+),血白细胞3.7×109/L,ALT60U/L,红细胞沉降率45mm/h,狼疮细胞(-),抗Sm抗体(+)。
该病人患的是
A.风湿性关节炎
B.类风湿关节炎
C.系统性红斑狼疮
D.急性肾小球肾炎
E.病毒性肝炎
The period ranging from 1865 to 1914 has been referred to as ()in the literary history of the United States.
A.the Age of Enlightenment
B.the Age of Romanticism
C.New England Transcendentalism
D.the Age of Realism