—What’s that building?

—       the medical equipment is stored.

A．There’s in which

B．That’s where

C．The building that

D．That’s the building which

膝关节骨性关节炎最主要的一项症状是（）。

A.关节僵直

B.关节疼痛

C.关节绞锁

D.关节积液

E.关节红肿