下列疾病中属于脊柱关节炎范畴的有（）
A.强直性脊柱炎
B.髂骨致密性骨炎
C.反应性关节炎
D.银屑病关节炎
E.骨关节炎
参考答案：A, C, D
These interesting articles were written by Anna, who for our magazine these years.
A．wrote
B．would write
C．is writing
D．has been writing
一束白光垂直射到一光栅上，在形成的同一级光栅光谱中，偏离中央明纹最远的是：（）
A.红光
B.绿光
C.黄光
D.紫光
