系统性红斑狼疮受累关节和肌肉的临床表现是（）。
A.关节畸形
B.非隐袭性关节炎
C.非畸形性关节炎
D.梭状指
E.关节错位
参考答案：C
---How did your students express their thanks to you on Teachers’ Day?
---A gift together with many flowers _______ sent to me.
A．is
B．are
C．was
D．were
