Animals often try to hide or run away when they      .[ ]

A. have been attacked            

B. will attack  

C. have attacked                    

D. are being attacked  

小棘苔藓的皮损特点是（）

A.针头大的毛囊性丘疹，中央有一根丝状干燥性角质小棘突出

B.可达数毫米，触之柔软

C.皮疹呈红色

D.丘疹可融合成片

E.形成直径<1cm的斑片