类风湿关节炎中与疾病活动性密切相关的关节外表现是()

A．肺间质纤维化

B．类风湿结节

C．脾大

D．胸痛

E．上腹不适

（） are two vertical supports，usually steel，one each side of the centerline of the ship used to support booms.

A.Shrouds

B.King posts

C.Stays

D.Turnbuckles