在图中，根据给出的入射光线AO画出反射光线OB，并标出反射角的度数．
例：If I were in your position，I would pay close attention.
→Were I in your position，I would pay close attention.
设a=logπ3，b=log34，c=log417，则（ ）
如图①，△ABC与△CDE是等腰直角三角形，直角边AC、CD在同一条直线上，点M、N分别是斜边AB、DE的中点，点P为AD的中点，连接AE、BD．
— ________. I am studying for the model test next week.
