6.有關類風濕關節炎的"關節外症狀"很多，下列那些症狀包括在內？ (1)iritis (2)episcleritis (3)subcutaneous nodule (4)keratoconjunctivitis sicca (5)pleural effusion (6)thrombocytopenia (7)glomerulonephritis (8)ischemic necrosis of femoral head (9)interstitial lung disease (10)cervical myelopathy
(A)(1)+(3)+(5)
(B)(2)+(4)+(9)
(C)(6)+(7)+(8)
(D)(8)+(9)+(10)
(E)(3)+(6)+(9)